[ 3]
Name on the Register[ 4]
Image
Date listed[ 5]
Location
City or town
Description
1
Belltown Historic District
Belltown Historic District
October 28, 1985 (#85003543 )
Roughly Main St. between W. High St. and CT 16 , and portions of cross streets W. High, Barton Hill-Summit, and Skinner St. 41°34′23″N 72°30′17″W / 41.573056°N 72.504722°W / 41.573056; -72.504722 (Belltown Historic District )
East Hampton
2
Black Horse Tavern
Black Horse Tavern
December 1, 1978 (#78002851 )
Southeast of Old Saybrook at 175 N. Cove Rd. 41°17′20″N 72°21′20″W / 41.288889°N 72.355556°W / 41.288889; -72.355556 (Black Horse Tavern )
Old Saybrook
3
BOC Site
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October 15, 1987 (#87001218 )
Address Restricted
Haddam
Archaeological site documented as part of the Lower Connecticut River Valley Woodland Period Archaeological TR. 0.1 acre.
4
Bridge No. 1132
Bridge No. 1132
September 29, 2004 (#04001091 )
CT 80 at the Hammonasset River 41°21′26″N 72°36′45″W / 41.357222°N 72.612553°W / 41.357222; -72.612553 (Bridge No. 1132 )
Killingworth
Open-spandrel concrete arch bridge built in 1934; extends into Madison in New Haven County
5
Bridge No. 1603
Bridge No. 1603
July 29, 1993 (#93000641 )
Devil's Hopyard Rd. (Rt. 434) over an unnamed brook in Devil's Hopyard State Park 41°29′02″N 72°20′33″W / 41.483756°N 72.342370°W / 41.483756; -72.342370 (Bridge No. 1603 )
East Haddam
Near Chapman Falls.
6
Bridge No. 1604
Bridge No. 1604
July 29, 1993 (#93000642 )
Devil's Hopyard Rd. (Rt. 434) over unnamed brook in Devil's Hopyard State Park 41°28′39″N 72°20′31″W / 41.477417°N 72.341954°W / 41.477417; -72.341954 (Bridge No. 1604 )
East Haddam
7
Bridge No. 1605
Bridge No. 1605
July 29, 1993 (#93000643 )
Devil's Hopyard Rd. (Rt. 434) over Muddy Brook in Devil's Hopyard State Park 41°28′32″N 72°20′31″W / 41.475528°N 72.341911°W / 41.475528; -72.341911 (Bridge No. 1605 )
East Haddam
8
Benjamin Bushnell Farm
Benjamin Bushnell Farm
May 10, 1990 (#90000761 )
52 Ingham Hill Rd. 41°19′49″N 72°25′14″W / 41.330278°N 72.420556°W / 41.330278; -72.420556 (Benjamin Bushnell Farm )
Essex
9
Elisha Bushnell House
Elisha Bushnell House
November 29, 1978 (#78002850 )
1445 Boston Post Rd. 41°17′14″N 72°24′31″W / 41.287222°N 72.408611°W / 41.287222; -72.408611 (Elisha Bushnell House )
Old Saybrook
10
Bushnell-Dickinson House
Bushnell-Dickinson House
August 28, 2013 (#13000289 )
170 Old Post Rd. 41°17′12″N 72°24′11″W / 41.286528°N 72.403087°W / 41.286528; -72.403087 (Bushnell-Dickinson House )
Old Saybrook
11
Camp Bethel
Camp Bethel
December 11, 2007 (#07001246 )
124 Camp Bethel Rd. 41°27′11″N 72°28′24″W / 41.45309°N 72.473215°W / 41.45309; -72.473215 (Camp Bethel )
Haddam
12
Hubbell Carter House
Hubbell Carter House
November 29, 2018 (#100003147 )
2 Carter Hill Rd. 41°18′52″N 72°30′59″W / 41.3144°N 72.516308°W / 41.3144; -72.516308 (Hubbell Carter House )
Clinton
13
Centerbrook Congregational Church
Centerbrook Congregational Church
February 12, 1987 (#87000113 )
Main St. 41°21′06″N 72°24′53″W / 41.351667°N 72.414722°W / 41.351667; -72.414722 (Centerbrook Congregational Church )
Essex
14
Clinton Village Historic District
Clinton Village Historic District
July 29, 1994 (#94000788 )
Along Cemetery Rd., Church, E. Main and Liberty Sts., Old Post Rd., and Waterside Ln. 41°16′36″N 72°31′07″W / 41.276667°N 72.518611°W / 41.276667; -72.518611 (Clinton Village Historic District )
Clinton
15
Commerce Street Historic District
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May 9, 2024 (#100009867 )
10-34, 38, 52, 58, odd #s 59-105, 109-125, 140-142 Commerce St, 7-9 Fisk Ave 41°16′23″N 72°31′40″W / 41.2731°N 72.5278°W / 41.2731; -72.5278 (Commerce Street Historic District )
Clinton
16
Comstock's Bridge
Comstock's Bridge
January 1, 1976 (#76001978 )
Southeast of East Hampton off CT 16 41°33′11″N 72°26′57″W / 41.553056°N 72.449167°W / 41.553056; -72.449167 (Comstock's Bridge )
East Hampton
17
Comstock-Cheney Hall
Comstock-Cheney Hall
April 15, 1982 (#82003769 )
Main and Summit Sts. 41°20′55″N 72°26′32″W / 41.348642°N 72.442236°W / 41.348642; -72.442236 (Comstock-Cheney Hall )
Essex
Better known as Ivoryton Theatre, the first summer theatre in the U.S.?
18
Connecticut Valley Railroad Roundhouse and Turntable Site
Connecticut Valley Railroad Roundhouse and Turntable Site
April 28, 1994 (#94000395 )
Off Main St. in Fort Saybrook Monument Park in Saybrook Point 41°17′02″N 72°21′05″W / 41.283889°N 72.351389°W / 41.283889; -72.351389 (Connecticut Valley Railroad Roundhouse and Turntable Site )
Old Saybrook
19
Cypress Cemetery
Cypress Cemetery
October 2, 2018 (#100003006 )
100 College St. 41°17′02″N 72°21′19″W / 41.2838°N 72.3553°W / 41.2838; -72.3553 (Cypress Cemetery )
Old Saybrook
20
D & H Scovil Industrial Historic District
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July 11, 2024 (#100010491 )
11 Candlewood Hill Rd, 11 and 12 Scovil Rd, 529 Brainard Hill Rd 41°29′34″N 72°34′10″W / 41.4927°N 72.5695°W / 41.4927; -72.5695 (D & H Scovil Industrial Historic District )
Haddam
21
Charles Daniels House
Charles Daniels House
February 19, 1988 (#88000094 )
43 Liberty St. 41°24′27″N 72°27′33″W / 41.4075°N 72.459167°W / 41.4075; -72.459167 (Charles Daniels House )
Chester
22
Amasa Day House
Amasa Day House
September 22, 1972 (#72001315 )
Plains Rd. 41°30′07″N 72°27′09″W / 41.501944°N 72.4525°W / 41.501944; -72.4525 (Amasa Day House )
East Haddam
23
Deep River Freight Station
Deep River Freight Station
December 21, 1994 (#94001445 )
152 River St. 41°23′38″N 72°25′37″W / 41.3939°N 72.4269°W / 41.3939; -72.4269 (Deep River Freight Station )
Deep River
24
Deep River Town Hall
Deep River Town Hall
January 1, 1976 (#76001977 )
CT 80 and CT 9A 41°23′06″N 72°26′11″W / 41.385°N 72.4364°W / 41.385; -72.4364 (Deep River Town Hall )
Deep River
25
Doane's Sawmill/Deep River Manufacturing Company
Doane's Sawmill/Deep River Manufacturing Company
February 21, 1985 (#85000313 )
Horse Hill and Winthrop Rds. 41°20′17″N 72°29′02″W / 41.3381°N 72.4839°W / 41.3381; -72.4839 (Doane's Sawmill/Deep River Manufacturing Company )
Westbrook and Deep River
26
Doris (Sailing yacht)
Doris (Sailing yacht)
May 31, 1984 (#84001108 )
Connecticut River off River Rd. 41°23′00″N 72°23′34″W / 41.3833°N 72.3928°W / 41.3833; -72.3928 (Doris (Sailing yacht) )
Deep River
27
Jedidiah Dudley House
Jedidiah Dudley House
April 12, 1982 (#82004339 )
Springbrook Rd. 41°18′54″N 72°21′51″W / 41.315°N 72.3642°W / 41.315; -72.3642 (Jedidiah Dudley House )
Old Saybrook
28
East Haddam Historic District
East Haddam Historic District
April 29, 1983 (#83001273 )
CT 149 , Broom, Norwich, Creamery, Lumberyard, and Landing Hill Rds. 41°27′23″N 72°27′45″W / 41.4564°N 72.4625°W / 41.4564; -72.4625 (East Haddam Historic District )
East Haddam
29
Samuel Eliot House
Samuel Eliot House
November 9, 1972 (#72001316 )
500 Main St. 41°17′02″N 72°22′08″W / 41.2839°N 72.3689°W / 41.2839; -72.3689 (Samuel Eliot House )
Old Saybrook
30
Emmanuel Church
Emmanuel Church
August 5, 1999 (#99000924 )
50 Emmanuel Church Rd. 41°23′34″N 72°36′33″W / 41.3928°N 72.6092°W / 41.3928; -72.6092 (Emmanuel Church )
Killingworth
31
Essex Freight Station
Essex Freight Station
April 19, 1994 (#94000337 )
1 Railroad Ave. 41°21′00″N 72°24′18″W / 41.3501°N 72.4049°W / 41.3501; -72.4049 (Essex Freight Station )
Essex
32
Fenwick Historic District
Fenwick Historic District
April 13, 1995 (#95000437 )
Roughly, along Agawam, Neponset and Pettipaug Aves. 41°16′14″N 72°21′23″W / 41.2706°N 72.35634°W / 41.2706; -72.35634 (Fenwick Historic District )
Old Saybrook
33
Goodspeed Opera House
Goodspeed Opera House
July 30, 1971 (#71000901 )
Norwich Rd. 41°27′07″N 72°27′47″W / 41.4519°N 72.4631°W / 41.4519; -72.4631 (Goodspeed Opera House )
East Haddam
34
Haddam Center Historic District
Haddam Center Historic District
February 9, 1989 (#89000012 )
Roughly 2.5 miles (4.0 km) along Walkley Rd. and CT 154 /Saybrook Rd. 41°28′46″N 72°30′55″W / 41.4794°N 72.5153°W / 41.4794; -72.5153 (Haddam Center Historic District )
Haddam
35
Hadlyme North Historic District
Hadlyme North Historic District
December 8, 1988 (#88002686 )
Roughly bounded by CT 82 , Town St., Banning Rd., and Old Town St. 41°25′45″N 72°24′25″W / 41.4292°N 72.4069°W / 41.4292; -72.4069 (Hadlyme North Historic District )
East Haddam
36
Hammonasset Paper Mill Site
Hammonasset Paper Mill Site
February 23, 1996 (#96000128 )
Green Hill Road at the Hammonasset River[ 6] 41°19′27″N 72°35′36″W / 41.3241°N 72.5932°W / 41.3241; -72.5932 (Hammonasset Paper Mill Site )
Killingworth
Extends into Madison .
37
Gen. William Hart House
Gen. William Hart House
November 9, 1972 (#72001318 )
350 Main St. 41°17′14″N 72°22′31″W / 41.2871°N 72.3752°W / 41.2871; -72.3752 (Gen. William Hart House )
Old Saybrook
38
James Hazelton House
James Hazelton House
November 16, 1988 (#88001468 )
23 Hayden Hill Rd. 41°28′46″N 72°31′06″W / 41.4794°N 72.5183°W / 41.4794; -72.5183 (James Hazelton House )
Haddam
39
Higganum Landing Historic District
Higganum Landing Historic District
December 10, 2018 (#100003206 )
40-68 Landing Rd., 2-14 Landing Rd. S 41°27′00″N 72°32′55″W / 41.4500°N 72.5485°W / 41.4500; -72.5485 (Higganum Landing Historic District )
Haddam
40
High Street Historic District
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August 10, 2020 (#100005404 )
7 Central Ave., 19-114 High St., and 1-62 John St. 41°16′52″N 72°31′37″W / 41.2810°N 72.5269°W / 41.2810; -72.5269 (High Street Historic District )
Clinton
41
Hill's Academy
Hill's Academy
August 23, 1985 (#85001831 )
22 Prospect St. 41°21′14″N 72°23′34″W / 41.3539°N 72.3928°W / 41.3539; -72.3928 (Hill's Academy )
Essex
42
Indian Hill Avenue Historic District
Indian Hill Avenue Historic District
May 26, 1983 (#83001274 )
Main St. and Indian Hill Ave. to the river 41°35′54″N 72°37′23″W / 41.5983°N 72.6231°W / 41.5983; -72.6231 (Indian Hill Avenue Historic District )
Portland
43
Ivoryton Historic District
Ivoryton Historic District
April 15, 2014 (#13000895 )
Roughly bounded by Main, N. Main, Oak, Blake & Summit Sts., Park Rd. & Comstock Ave. 41°20′54″N 72°26′27″W / 41.348311°N 72.440813°W / 41.348311; -72.440813 (Ivoryton Historic District )
Essex
Ivoryton, Connecticut
44
James Pharmacy
James Pharmacy
August 5, 1994 (#94000845 )
2 Pennywise Ln. 41°17′09″N 72°22′35″W / 41.285833°N 72.376389°W / 41.285833; -72.376389 (James Pharmacy )
Old Saybrook
Home and workplace of Anna Louise James (1886–1977), the first African-American woman pharmacist in the state.
45
Lay-Pritchett House
Lay-Pritchett House
October 11, 1978 (#78002854 )
North of Westbrook on CT 145 41°19′55″N 72°29′35″W / 41.331944°N 72.493056°W / 41.331944; -72.493056 (Lay-Pritchett House )
Westbrook
46
Daniel and Mary Lee House
Daniel and Mary Lee House
April 3, 1991 (#91000365 )
Pepperidge Rd. E of Jobs Pond Rd. 41°34′47″N 72°34′59″W / 41.579722°N 72.583056°W / 41.579722; -72.583056 (Daniel and Mary Lee House )
Portland
47
Little Haddam Historic District
Little Haddam Historic District
August 1, 1996 (#96000783 )
Roughly bounded by E. Haddam Rd., Orchard Rd., and Town St. 41°28′44″N 72°26′48″W / 41.478889°N 72.446667°W / 41.478889; -72.446667 (Little Haddam Historic District )
East Haddam
48
David Lyman II House
David Lyman II House
February 6, 1986 (#86000149 )
5 Lyman Rd. 41°29′47″N 72°42′43″W / 41.496389°N 72.711944°W / 41.496389; -72.711944 (David Lyman II House )
Middlefield
49
Thomas Lyman House
Thomas Lyman House
November 20, 1975 (#75001921 )
105 Middlefield Rd. 41°29′18″N 72°41′16″W / 41.4883°N 72.6877°W / 41.4883; -72.6877 (Thomas Lyman House )
Durham
50
Lynde Point Lighthouse
Lynde Point Lighthouse
May 29, 1990 (#89001469 )
Southeastern terminus of Sequassen Ave. 41°16′16″N 72°20′38″W / 41.271111°N 72.343889°W / 41.271111; -72.343889 (Lynde Point Lighthouse )
Old Saybrook
51
Main Street Historic District
Main Street Historic District
October 24, 1985 (#85003389 )
Roughly bounded by Nooks Hill Rd., Prospect Hill Rd., Wall and West Sts. and New Ln., and Stevens Ln. and Main St. 41°36′07″N 72°38′56″W / 41.601944°N 72.648889°W / 41.601944; -72.648889 (Main Street Historic District )
Cromwell
52
Main Street Historic District
Main Street Historic District
September 4, 1986 (#86002837 )
Roughly Maple Ave. and Main St. between Talcott Ln. and Higganum Rd. 41°28′26″N 72°40′51″W / 41.473889°N 72.680833°W / 41.473889; -72.680833 (Main Street Historic District )
Durham
53
Marlborough Street Historic District
Marlborough Street Historic District
March 20, 2012 (#12000130 )
58, 64, 69, 70, 78, 88, & 92 Marlborough St. 41°34′15″N 72°38′05″W / 41.570814°N 72.634825°W / 41.570814; -72.634825 (Marlborough Street Historic District )
Portland
54
Middle Haddam Historic District
Middle Haddam Historic District
February 3, 1984 (#84001112 )
Moodus and Long Hill Rds. 41°33′11″N 72°33′06″W / 41.553056°N 72.551667°W / 41.553056; -72.551667 (Middle Haddam Historic District )
East Hampton
55
Middle Haddam School
Middle Haddam School
October 18, 2019 (#100004545 )
12 Schoolhouse Ln. 41°33′09″N 72°32′52″W / 41.5525°N 72.5478°W / 41.5525; -72.5478 (Middle Haddam School )
East Hampton
56
Middletown Upper Houses Historic District
Middletown Upper Houses Historic District
July 27, 1979 (#79002620 )
CT 99 41°35′19″N 72°38′28″W / 41.588611°N 72.641111°W / 41.588611; -72.641111 (Middletown Upper Houses Historic District )
Cromwell
Historic district of area that was in Middletown, until it was split to Cromwell in 1851
57
Millington Green Historic District
Millington Green Historic District
July 25, 1996 (#96000782 )
Roughly bounded by Millington, Tater Hill, Haywardville, and Old Hopyard Rds. 41°29′06″N 72°21′28″W / 41.485°N 72.357778°W / 41.485; -72.357778 (Millington Green Historic District )
East Haddam
58
North Cove Historic District
North Cove Historic District
July 22, 1994 (#94000766 )
Roughly N. Cove Rd. from Church St. to the Connecticut River and adjacent properties on Cromwell Pl. 41°17′13″N 72°21′32″W / 41.286944°N 72.358889°W / 41.286944; -72.358889 (North Cove Historic District )
Old Saybrook
59
Oak Lodge
Oak Lodge
September 4, 1986 (#86001734 )
Western side of Schreeder Pond, Chatfield Hollow State Park 41°22′11″N 72°35′27″W / 41.369722°N 72.590833°W / 41.369722; -72.590833 (Oak Lodge )
Killingworth
60
Old Saybrook South Green
Old Saybrook South Green
September 3, 1976 (#76001984 )
Old Boston Post Rd., Pennywise Lane, Main St. 41°17′17″N 72°22′36″W / 41.287933°N 72.376771°W / 41.287933; -72.376771 (Old Saybrook South Green )
Old Saybrook
61
Old Saybrook Town Hall and Theater
Old Saybrook Town Hall and Theater
June 21, 2007 (#07000558 )
300 Main St. 41°17′26″N 72°23′11″W / 41.290556°N 72.386389°W / 41.290556; -72.386389 (Old Saybrook Town Hall and Theater )
Old Saybrook
Now known as the Katharine Hepburn Cultural Arts Center
62
Old Town Hall
Old Town Hall
February 23, 1972 (#72001310 )
On the green between Liberty St. and Goose Hill Rd. 41°24′25″N 72°27′09″W / 41.406944°N 72.4525°W / 41.406944; -72.4525 (Old Town Hall )
Chester
63
Oriole Rockshelter
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October 15, 1987 (#87001222 )
Address Restricted
East Haddam
64
Parker House
Parker House
November 29, 1978 (#78002853 )
680 Middlesex Turnpike 41°19′25″N 72°22′30″W / 41.323611°N 72.375°W / 41.323611; -72.375 (Parker House )
Old Saybrook
65
Parmelee House
Parmelee House
May 15, 2007 (#07000417 )
4 Beckwith Rd. 41°23′03″N 72°35′13″W / 41.384167°N 72.586944°W / 41.384167; -72.586944 (Parmelee House )
Killingworth
66
Portland Brownstone Quarries
Portland Brownstone Quarries
May 16, 2000 (#00000703 )
Brownstone Ave. and Silver St. 41°34′30″N 72°38′36″W / 41.575°N 72.643333°W / 41.575; -72.643333 (Portland Brownstone Quarries )
Portland
Quarried since 1690, source of vast quantities of brownstone for New York City, Philadelphia, Boston, other urban areas' buildings.
67
Pratt House
Pratt House
August 23, 1985 (#85001824 )
19 West Ave. 41°21′13″N 72°23′40″W / 41.3536°N 72.3945°W / 41.3536; -72.3945 (Pratt House )
Essex
68
Dr. Ambrose Pratt House
Dr. Ambrose Pratt House
November 9, 1972 (#72001311 )
Pratt St. 41°24′01″N 72°26′43″W / 41.400278°N 72.445278°W / 41.400278; -72.445278 (Dr. Ambrose Pratt House )
Chester
69
Caleb Pratt House
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March 28, 2024 (#100010112 )
26 Gates Road 41°20′27″N 72°23′29″W / 41.3409°N 72.3913°W / 41.3409; -72.3913 (Caleb Pratt House )
Essex
70
Humphrey Pratt Tavern
Humphrey Pratt Tavern
November 7, 1972 (#72001320 )
287 Main St. 41°17′18″N 72°22′35″W / 41.288333°N 72.376389°W / 41.288333; -72.376389 (Humphrey Pratt Tavern )
Old Saybrook
71
Pratt, Read and Company Factory Complex
Pratt, Read and Company Factory Complex
August 30, 1984 (#84001117 )
Main St. between Bridge and Spring Sts. and 5 Bridge St. 41°23′25″N 72°26′22″W / 41.390278°N 72.439444°W / 41.390278; -72.439444 (Pratt, Read and Company Factory Complex )
Deep River
72
Rapallo Viaduct
Rapallo Viaduct
August 21, 1986 (#86002728 )
Flat Brook and former Air Line railroad right-of-way 41°34′19″N 72°28′19″W / 41.571944°N 72.471944°W / 41.571944; -72.471944 (Rapallo Viaduct )
East Hampton
73
Roaring Brook I Site
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July 31, 1987 (#87001220 )
Address Restricted
East Haddam
Archaeological site documented as part of the Lower Connecticut River Valley Woodland Period Archaeological TR. Less than 1 acre.
74
Roaring Brook II Site
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July 31, 1987 (#87001221 )
Address Restricted
East Haddam
Archaeological site documented as part of the Lower Connecticut River Valley Woodland Period Archaeological TR. Less than 1 acre.
75
Sage-Kirby House
Sage-Kirby House
April 29, 1982 (#82003767 )
93 Shunpike Rd. 41°36′41″N 72°40′36″W / 41.611389°N 72.676667°W / 41.611389; -72.676667 (Sage-Kirby House )
Cromwell
76
Saybrook Breakwater Lighthouse
Saybrook Breakwater Lighthouse
May 29, 1990 (#89001474 )
Southern terminus of Saybrook Jetty at the mouth of the Connecticut River 41°15′47″N 72°20′35″W / 41.263056°N 72.343056°W / 41.263056; -72.343056 (Saybrook Breakwater Lighthouse )
Old Saybrook
77
Seventh Sister
Seventh Sister
July 31, 1986 (#86002103 )
67 River Rd. 41°25′25″N 72°25′53″W / 41.423611°N 72.431389°W / 41.423611; -72.431389 (Seventh Sister )
East Haddam and Lyme
Now Gillette Castle State Park.
78
Shore Line Electric Railway Power House
Shore Line Electric Railway Power House
June 20, 2019 (#100004086 )
220 Ferry Road 41°18′51″N 72°21′39″W / 41.3141°N 72.3609°W / 41.3141; -72.3609 (Shore Line Electric Railway Power House )
Old Saybrook
79
Steamboat Dock Site
Steamboat Dock Site
April 1, 1982 (#82003768 )
Main St. 41°21′04″N 72°23′06″W / 41.351111°N 72.385°W / 41.351111; -72.385 (Steamboat Dock Site )
Essex
Now the Connecticut River Museum
80
William Stevens House
William Stevens House
May 30, 1985 (#85001163 )
131 Cow Hill Rd. 41°18′17″N 72°32′45″W / 41.3047°N 72.5457°W / 41.3047; -72.5457 (William Stevens House )
Clinton
81
William Tully House
William Tully House
March 15, 1982 (#82004340 )
135 N. Cove Rd. 41°17′21″N 72°21′26″W / 41.289167°N 72.357222°W / 41.289167; -72.357222 (William Tully House )
Old Saybrook
82
Villa Bella Vista
Villa Bella Vista
December 28, 2000 (#00001560 )
7 Old Depot Rd. 41°24′12″N 72°26′28″W / 41.403333°N 72.441111°W / 41.403333; -72.441111 (Villa Bella Vista )
Chester
83
William Ward Jr. House
William Ward Jr. House
February 19, 1988 (#88000109 )
137 Powder Hill Rd. 41°30′14″N 72°43′47″W / 41.5040°N 72.7298°W / 41.5040; -72.7298 (William Ward Jr. House )
Middlefield
84
Warner House
Warner House
February 19, 1987 (#87000174 )
307 Town St. 41°27′12″N 72°26′27″W / 41.453333°N 72.440833°W / 41.453333; -72.440833 (Warner House )
East Haddam
85
Jonathan Warner House
Jonathan Warner House
December 19, 1978 (#78002855 )
47 Kings Highway 41°25′00″N 72°26′27″W / 41.416667°N 72.440833°W / 41.416667; -72.440833 (Jonathan Warner House )
Chester
86
Westbrook Town Center Historic District
Westbrook Town Center Historic District
October 16, 2017 (#100001732 )
Old Clinton at Hammock Rds., Boston Post Rd. at Bellstone Ave., Trolley Rd., Boston Post Rd. at Goodspeed Dr. 41°17′04″N 72°26′44″W / 41.284394°N 72.445492°W / 41.284394; -72.445492 (Westbrook Town Center Historic District )
Westbrook
87
White-Overton-Callander House
White-Overton-Callander House
May 21, 2014 (#13000896 )
492 Main Street 41°35′15″N 72°37′43″W / 41.5876°N 72.6285°W / 41.5876; -72.6285 (White-Overton-Callander House )
Portland
House museum of the Portland Historical Society
88
Ambrose Whittlesey House
Ambrose Whittlesey House
August 23, 1985 (#85001830 )
14 Main St. 41°17′51″N 72°22′37″W / 41.2975°N 72.376944°W / 41.2975; -72.376944 (Ambrose Whittlesey House )
Old Saybrook
89
John Whittlesey Jr. House
John Whittlesey Jr. House
October 26, 1984 (#84002644 )
40 Ferry Rd. 41°18′49″N 72°21′33″W / 41.31366°N 72.35923°W / 41.31366; -72.35923 (John Whittlesey Jr. House )
Old Saybrook
90
Wickham Road Historic District
Wickham Road Historic District
July 25, 1996 (#96000781 )
Roughly the junction of Wickham and Geoffrey Rds. 41°30′16″N 72°22′46″W / 41.504444°N 72.379444°W / 41.504444; -72.379444 (Wickham Road Historic District )
East Haddam
91
Williams and Stancliff Octagon Houses
Williams and Stancliff Octagon Houses
April 22, 1976 (#76001985 )
26 and 28 Marlborough St. 41°34′21″N 72°38′20″W / 41.5725°N 72.638889°W / 41.5725; -72.638889 (Williams and Stancliff Octagon Houses )
Portland
92
Working Girls' Vacation Society Historic District
Working Girls' Vacation Society Historic District
June 3, 1994 (#94000557 )
60, 64, and 66 Mill Rd. 41°26′31″N 72°23′43″W / 41.441944°N 72.395278°W / 41.441944; -72.395278 (Working Girls' Vacation Society Historic District )
East Haddam