Henrietta is a town in Monroe County, New York, United States. It is a suburb of Rochester. The population was 39,028 at the 2000 census. Established in 1818, the town is named after Henrietta Laura Pulteney, Countess of Bath, daughter of Sir William Pulteney, 5th Baronet, a major British investor from the Pulteney Association in U.S. real estate at the end of the 18th century. Henrietta is home to the Rochester Institute of Technology.