Merritt Island Causeway, Road bridge along Space Coast in Florida, United States.

The Merritt Island Causeway is a road bridge that spans two rivers to connect Cocoa, Merritt Island, and Cocoa Beach in Florida. The four-lane highway provides access to Kennedy Space Center and Cape Canaveral facilities.

The first wooden bridge of the causeway system opened in 1917, establishing the initial connection between Cocoa and Merritt Island. The Hubert H. Humphrey Bridge section was funded through NASA and U.S. Air Force support in the 1960s.

The route reflects how Florida's Space Coast shifted from rural groves to a center of space exploration. This transformation remains visible in how the landscape and nearby communities developed around the space industry.

The causeway runs west to east from Cocoa through Merritt Island to Cocoa Beach, crossing the Indian River and the Banana River Lagoon. The eastern stretch is signed as the Cocoa Beach Causeway. The old narrow drawbridge near Old Causeway Road on Horti Point is gone, so use the current SR 520 alignment.

The original 1922 crossing ran from Horti Point near Old Causeway Road; its surviving ends are Old Causeway Road in Angel City and Minuteman Causeway Boulevard in Cocoa Beach. A 1970 proposal to revive that Minuteman route over the old Banana River Bridge was formally denied by the State of Florida.