Most of Cinco Bayou was built recently: 1% of its homes predate 1940 and the median home dates from 1987. Below: maps from 1938 on and the census since 1960.
Cinco Bayou was platted in 1940, and the Town of Cinco Bayou officially incorporated as a municipality on July 3, 1950, at a meeting held at the Cinco Bayou garage, attended by about 60 people. Gordon Gibson was elected the first mayor. At this time there were about 250 residents in the area between the Fort Walton city limits and the Cinco Bayou, an east-west oriented finger of water on the west end of the Choctawhatchee Bay.
Founding dates: Wikidata, Wikipedia, the U.S. post office records of Blevins & Helbock (CC0) and the Census. Homes by year built: Census ACS 2020–24. National Register of Historic Places: National Park Service (list of May 22, 2026). Old photos, postcards and papers: Wikimedia Commons, the Library of Congress and other public archives, credited on each item’s page. Maps: U.S. Geological Survey historical topographic maps (via Esri) and Sanborn fire-insurance maps (Library of Congress). History text and census tables: Wikipedia (CC BY-SA 4.0). Places that used to be: USGS Geographic Names Information System (2021). How TownRatings grades history →
From Wikimedia Commons (2), Wikipedia, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia) and the USGS Geographic Names Information System. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.