Richmond County, New York

Founding: 1683
Parent county: The colony of New Netherland

Namesake: Charles Lennox, Duke of Richmond
Seat: New Dorp (1683–1729); Richmondtown (1729–1913); St. George (1913–)

Land area: 59 square miles

Population (2020): 495,747 

Population (historic): 3,835 (1790); 7,082 (1830); 33,029 (1870); 67,021 (1900); 158,346 (1930)

Periods of population growth: pre-1790–2020

Pre-1940 residences (estimated): 34,731 (19.2%)
Pre-1940 housing survival rate: 66.4%
Pre-1860 housing survival rate (1940): 20.6%

Housing in disrepair (1950): 3.1%

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Richmondtown (ex-seat)

Namesake: Richmond County

Founding: 1728 (platting)
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