In 2018, South Bay, FL had a population of 5.12k people with a median age of 39.1 and a median household income of $33,958. Between 2017 and 2018 the population of South Bay, FL grew from 5,092 to 5,116, a 0.471% increase and its median household income grew from $28,795 to $33,958, a 17.9% increase. The 5 largest ethnic groups in South Bay, FL are Black or African American (Non-Hispanic) (54.7%), White (Hispanic) (21.2%), White (Non-Hispanic) (17.9%), Other (Hispanic) (2.01%), and Two+ (Non-Hispanic) (1.31%). NaNk% of the people in South Bay, FL speak a non-English language, and 86.9% are U.S. citizens.