Croton-on-Hudson is a village in Westchester County, New York, United States. The population was 8,070 at the 2010 census. It is located in the town of Cortlandt, in New York City's northern suburbs. The village was incorporated in 1898.

Clifford Harmon, a realtor, purchased 550 acres of land next to the village of Croton in 1903. He gave part of the land to the New York Central Railroad to build a train station, on the condition that the station would forever be named after him. Today it is called the Croton-Harmon station of the Metro-North Railroad. In 1906, the station became a major service facility for the railroad. The station expanded even further in 1913, when it became the stop at which electric trains from New York City switched to steam engines.

Croton-on-Hudson is located at 41°12′15″N 73°53′10″W / 41.20417°N 73.88611°W / 41.20417; -73.88611 (41.204228, -73.886177) on the shores of the Hudson River. The zip codes are 10520 and 10521.

According to the United States Census Bureau, the village has a total area of 10.8 square miles (28 km²), of which 4.8 square miles (12 km²) is land and 6.1 square miles (16 km²), or 56.06%, is water.

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