Latham is a hamlet and census-designated place in Albany County, New York, United States. It is located along U.S. Route 9 in the town of Colonie, a dense suburb north of Albany. As of the 2020 census, the population was 13,680, down from 20,736 in 2010. Latham was a census-designated place in the 1970, 1980, and 1990 US Censuses, but ceased to be in the 2000 Census, then became a CDP again in 2020.