| Name | Styles | Significance | Periods |
|---|
Dudleytown Historic District (Roughly, Clapboard Hill Rd. from Tanner Marsh Rd. to Murray Ln., East River Rd. SE to Trailwood Dr., and Duck Hole Rd.) | Early Republic, Greek Revival, Colonial Revival | exploration, settlement, architecture, agriculture | 1925-1949, 1800-1824, 1825-1849, 1750-1799, 1700-1749, 1850-1874, 1875-1899, 1900-1924 |
Elisha Pitkin House (173 High Woods Dr.) | | architecture, industry, military, politics, government | 1750-1799, 1650-1699 |
Falkner's Island Lighthouse (Long Island Sound, 5 mi. S of Guilford) | | engineering, transportation | 1850-1874, 1800-1824, 1825-1849 |
Guilford Historic Town Center (Bounded by West River, I-95, East Creek and Long Island Sound) | Federal, Colonial, Greek Revival | community planning and development, architecture | 1600-1649, 1900-1924, 1700-1749, 1825-1849, 1875-1899, 1850-1874, 1800-1824, 1750-1799, 1650-1699 |
Henry Whitfield House (248 Old Whitfield St.) | No Style Listed, Colonial | architecture, social history, conservation | 1600-1649, 1875-1899, 1900-1924, 1925-1949 |
Hyland- Wildman House (Boston St.) | | architecture | 1650-1699, 1900-1924 |
Meeting House Hill Historic District (Roughly bounded by Long Hill, Great Hill, and Ledge Hill Rds.) | Greek Revival, Federal, Gothic | religion, architecture | 1875-1899, 1850-1874, 1800-1824 |
Route 146 Historic District (Rt. 146 between Flat Rock Rd. and West River bridge) | Late 19th And Early 20th Century American Movements, Mid 19th Century Revival, Late Victorian | transportation, architecture | 1825-1849, 1925-1949, 1800-1824, 1750-1799, 1875-1899, 1900-1924, 1700-1749, 1850-1874 |