County Route 520 is a county highway in the U.S. state of New Jersey. County Route 520 is a major road across Monmouth County connecting the county's central towns to the Jersey Shore at Sea Bright. The highway extends 22.39 miles (36.03 km) from Englishtown Road in Old Bridge Township to Ocean Avenue in Sea Bright.

Sea Bright is a borough situated on the Jersey Shore, within Monmouth County, in the U.S. state of New Jersey. As of the 2020 United States census, the borough's population was 1,449, an increase of 37 (+2.6%) from the 2010 census count of 1,412, which in turn had reflected a decline of 406 (−22.3%) from the 1,818 counted in the 2000 census.