Gerard Bancker (sometimes Latin Gerardus, or colloquial Dutch Gerrit) (14 February 1740, Albany, New York – January 1799) was an American surveyor and politician.
Bancker was the son of Gerard Bancker Sr. and Maria de Peyster, who had married in New York City in 1731. He was the grandson of Johannes de Peyster (1666 – 1719), the 23rd Mayor of New York City between 1698 and 1699, and great-grandson of Johannes de Peyster, Sr.
In 1774, as city surveyor, he made a map of St. George's Ferry on Nassau Island.
He was Deputy Treasurer from 1776 to 1778, and New York State Treasurer from 1778 to 1798.
He collected a large number of broadsides from the revolutionary era which were sold at auction in 1898 in Philadelphia.