Callahan is a town in Nassau County, Florida, home to about 1,514 people across 1.8 square miles. It has no ZIP code of its own: it’s part of 32011.
Homes sold for a median of $229 per square foot in the three months ending August 2026, a balanced market.
Mostly Nassau Village-Ratliff; part is in Callahan
Each card is that ZIP code’s whole market, including any part outside Callahan. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Callahan’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Jacksonville International Airport (JAX)9 miles away |
|---|---|
| Nearest city of 250,000+ | Jacksonville, FL17 miles away |
| Nearest city of 1 million+ | Philadelphia, PA754 miles away |
Straight-line distances from the center of Callahan; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Callahan had 1,526 residents in the 2020 census, up 59% since 2000.
It’s the 725th largest of 954 towns in Florida by population.
Nassau County grew from 9,654 residents in 1900 to 90,352 in 2020.
Nassau County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 92°F in summer, and winter lows average 43°F. About 53.5 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Jacksonville, FL weather station (8 miles away).
21,651 jobs at 2,261 businesses in Nassau County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
57 doctors and other health care providers list an office in Callahan.
Nearest hospitals
Providers with an office here
| Primary care doctors | 12 |
|---|---|
| Specialist doctors | 1 |
| Dentists | 5 |
| Nurse practitioners and physician assistants | 23 |
| Mental health providers | 4 |
| Physical and occupational therapists | 10 |
| Optometrists | 1 |
| Chiropractors | 1 |
| Pharmacies | 7 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Grocery stores
Libraries
Counts are within about 1 mile of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by Nassau. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Callahan Elementary SchoolCallahan | Pre-K–2 | 614 | Public | 1.1 mi |
| Callahan Intermediate SchoolCallahan | 3–5 | 586 | Public | 4.1 mi |
| Callahan Middle SchoolCallahan | 6–8 | 704 | Public | 1.9 mi |
| West Nassau County High SchoolCallahan | 9–12 | 923 | Public | 1.1 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Sonshine Christian AcademyCallahan | K–12 | 264 | Assembly of God | 1.1 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Nassau Village-Ratliff.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.