J
- Jacksonville
- Jacksonville Beach
- Jacob City
- Jacobs
- Jamieson
- Jan Phyl Village
- Jarrett
- Jasmine Estates
- Jasper
- Jay
- Jena
- Jennings
- Jensen Beach
- Jerome
- Jessamine
- Jessie Willies
- Jewfish
- Joels Landing
- Johnson
- Johnson
- Johnson Crossroad
- Johnstown
- Jones Corner
- Jones Landing
- Jonesville
- Joshua
- Jumeau
- June Park
- Juniper
- Juno Beach
- Juno Ridge
- Jupiter
- Jupiter Inlet Beach Colony
- Jupiter Inlet Colony
- Jupiter Island