Lafayette Parish
Louisiana · County seat: Lafayette · County equivalent (e.g. borough in AK, parish in LA)
FIPS code 22055 is Lafayette Parish, Louisiana. With a population of 243,175 (2022 ACS estimate), it ranks #5 in Louisiana and #280 nationally. Lafayette Parish is part of the Lafayette, LA. The state FIPS code for Louisiana is 22. This code is used in Census Bureau, BLS, EPA, HUD, and USDA federal datasets to identify this county.
County FIPS
22055
Population
243,175
2022 ACS · #280 nationally
Density
904.9/mi²
people per sq mile
Land Area
269
sq miles
Urban/Rural
Metro — 250K–1M population
RUCC 2
How This FIPS Code Works
The 5-digit FIPS code 22055 is formed by combining the 2-digit state identifier 22 (Louisiana) with the 3-digit county identifier 055. Together they uniquely identify Lafayette Parish in every US federal dataset. No two counties share the same 5-digit FIPS code.
Census ACS Data for FIPS 22055
From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 22055.
Median Household Income
$66,617
ACS B19013_001E
Poverty Rate
16.8%
ACS B17001 (below poverty level)
Median Age
36.2
ACS B01002_001E
Metropolitan Area
Adjacent Counties (5)
Counties that share a border with Lafayette Parish. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 22055.
Federal Datasets Using Code 22055
FIPS code 22055 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 22055 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:055",
"in": "state:22",
"key": "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json() # [[header...], [Lafayette Parish, Louisiana, income, pop, ...]-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '22055';
-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '22'
AND county_fips = '055';
-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 22055 is WRONG for this countylibrary(tidycensus)
get_acs(
geography = "county",
variables = c(income = "B19013_001E", pop = "B01003_001E"),
state = "22",
county = "055",
year = 2022
)ZIP Codes in Lafayette Parish
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 Lafayette Parish. Why FIPS ≠ ZIP →
| ZIP Code | % in county |
|---|---|
| 70558 | 100.0% |
| 70503 | 100.0% |
| 70506 | 100.0% |
| 70507 | 100.0% |
| 70508 | 100.0% |
| 70501 | 100.0% |
| 70529 | 97.1% |
| 70520 | 96.7% |
| 70583 | 85.5% |
| 70592 | 74.4% |
| 70518 | 51.3% |
| 70578 | 18.2% |
| 70555 | 2.9% |
| 70517 | 1.1% |
| 70525 | 0.8% |
| 70560 | 0.2% |