County Route 533 is a county highway in the U.S. state of New Jersey. The highway extends 32.78 miles (52.75 km) from the White Horse Circle, in Hamilton Township to Middlesex CR 607 on the border of Bound Brook and Middlesex Borough. CR 533 shares a long concurrency with U.S. Route 206 through Princeton and Montgomery Township, while portions of the roadway in Somerset County are part of the Millstone River Valley Scenic Byway.

White Horse is an unincorporated community and census-designated place (CDP) located within Hamilton Township, in Mercer County, in the U.S. state of New Jersey. As of the 2010 United States Census, the CDP's population was 9,494.