New Haven is a census-designated place (CDP) in Crosby Township, Hamilton County, Ohio, United States.

This was necessary because there was already a New Haven in Huron County, Ohio, and the name was assigned by the first postmaster, Alexander Preston Cavender.

According to the United States Census Bureau, the CDP has a total area of 1.3 square miles (3.4 km2), all land.

56.6% of all households were made up of individuals, and 26.3% were someone living alone who was 65 years of age or older.

[5] According to the U.S. Census American Community Survey, for the period 2016-2020 the estimated median annual income for a household in the CDP was $31,750.