Merritt Island is a census designated place in Brevard County, on the Atlantic coast of the U.S. state of Florida. As of the 2000 census, the population was 36,090. The name 'Merritt Island' also refers to the extent of the former island, which is now a peninsula. Merritt Island apartments for rent comparison page shows most up to date rent information on Merritt Island apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.