Clarkson Crolius (bapt. October 30, 1774 New York City – October 5, 1843) was an American businessman and politician.
He was the son of Johannes (John) Crolius and Maria Clarkson Crolius. His grandfather Johan Willem (William) Crolius, a manufacturer of stoneware, is said to have come from Germany to New York City, and ran a pottery in Reade Street, near Broadway. William's son John Crolius acquired property on Reade Street, about one hundred feet west of Centre, where the pottery and the family residence were maintained for many years, until Clarkson Crolius removed the works to No. 65 and 67 Bayard Street, the home still remaining in Reade Street.
In 1811, as Grand Sachem of the Tammany Society, he laid the foundation stone of the old Tammany Hall in Frankfort Street.
At the beginning of the War of 1812, he was a major in the Twenty-seventh Regiment of the State Militia, but resigned his commission and received an appointment to the same rank in the regular service. He finished the war as a colonel.
In 1830, he was one of the incorporators of the Canajoharie and Catskill Railroad.
In 1831, he was the leader of the National Republican Party in New York City.
He married Elizabeth Meyer (ca. 1774–1856). Their son, State Senator Clarkson Crolius (b. 1801), discontinued the manufacture of stoneware in Bayard Street in 1845, and the pottery was afterwards demolished.
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