FIPS code 48039 is Brazoria County, Texas. With a population of 374,600 (2022 ACS estimate), it ranks #14 in Texas and #190 nationally. Brazoria County is part of the Houston-Pasadena-The Woodlands, TX. The state FIPS code for Texas is 48. This code is used in Census Bureau, BLS, EPA, HUD, and USDA federal datasets to identify this county.
County FIPS
48039
Population
374,600
2022 ACS · #190 nationally
Density
275.9/mi²
people per sq mile
Land Area
1,358
sq miles
Urban/Rural
Metro — 1M+ population
RUCC 1
How This FIPS Code Works
The 5-digit FIPS code 48039 is formed by combining the 2-digit state identifier 48 (Texas) with the 3-digit county identifier 039. Together they uniquely identify Brazoria County in every US federal dataset. No two counties share the same 5-digit FIPS code.
Census ACS Data for FIPS 48039
From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 48039.
Median Household Income
$91,972
ACS B19013_001E
Poverty Rate
7.5%
ACS B17001 (below poverty level)
Median Age
36.3
ACS B01002_001E
Metropolitan Area
Adjacent Counties (5)
Counties that share a border with Brazoria County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 48039.
Federal Datasets Using Code 48039
FIPS code 48039 appears as the county identifier in the following federal datasets. Analysts joining data across these sources use this code as the common geographic key.
Using FIPS Code 48039 in Code
Common patterns for querying federal datasets by this county's FIPS code. The leading zeros are significant — always treat FIPS codes as strings, not integers.
import requests
url = "https://api.census.gov/data/2022/acs/acs5"
params = {
"get": "NAME,B19013_001E,B01003_001E",
"for": "county:039",
"in": "state:48",
"key": "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json() # [[header...], [Brazoria County, Texas, income, pop, ...]-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '48039';
-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '48'
AND county_fips = '039';
-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 48039 is WRONG for this countylibrary(tidycensus)
get_acs(
geography = "county",
variables = c(income = "B19013_001E", pop = "B01003_001E"),
state = "48",
county = "039",
year = 2022
)ZIP Codes in Brazoria County
ZIP codes do not align perfectly with county boundaries — a single ZIP code can span multiple counties, and a county can contain parts of many ZIP codes. The ratios below (from the Census 2020 ZCTA relationship file) show the land area share of each ZCTA that falls within Brazoria County. Why FIPS ≠ ZIP →
| ZIP Code | % in county |
|---|---|
| 77422 | 100.0% |
| 77431 | 100.0% |
| 77486 | 100.0% |
| 77515 | 100.0% |
| 77531 | 100.0% |
| 77534 | 100.0% |
| 77541 | 100.0% |
| 77566 | 100.0% |
| 77577 | 100.0% |
| 77578 | 100.0% |
| 77584 | 95.8% |
| 77581 | 94.3% |
| 77583 | 91.6% |
| 77511 | 86.6% |
| 77480 | 81.8% |
| 77430 | 78.5% |
| 77444 | 49.6% |
| 77517 | 25.0% |
| 77510 | 6.3% |
| 77546 | 1.9% |
| 77545 | 0.8% |