Union Avenue Bridge is a vehicular bridge over the Passaic River in northeastern New Jersey, crossing the county line at the town of Rutherford in Bergen County and the city of Passaic in Passaic County.

[6] It takes its name from Union Avenue (CR S32) in Rutherford which connects to River Drive (and access to Route 21) in Passaic.

The two-lane, four-span fixed bridge which opened in 2002 is 13.2 miles (21.2 km) from the river's mouth at Newark Bay.

[7] There is another Union Avenue Bridge traversing the Passaic at Little Falls The bridge replaced an earlier structure built in 1896.

[5] In 1963 it was struck by a barge which left it damaged; requiring it remain in the open position for two weeks.