what county is holt fl
Holt, Florida. Holt is an unincorporated community located in Okaloosa County, Florida, United States. Its area calling code is 850 and its ZIP code is 32564. Holt is located in western Okaloosa County along US 90 and County Road 189 (Log Lake Road). South along CR 189 is an interchange for Interstate 10 (Exit 45).