Lincoln County
Oklahoma · County seat: Chandler · Active county or equivalent
FIPS code 40081 is Lincoln County, Oklahoma. With a population of 33,734 (2022 ACS estimate), it ranks #30 in Oklahoma and #1364 nationally. Lincoln County is part of the Oklahoma City, OK. The state FIPS code for Oklahoma is 40. This code is used in Census Bureau, BLS, EPA, HUD, and USDA federal datasets to identify this county.
County FIPS
40081
Population
33,734
2022 ACS · #1364 nationally
Density
35.4/mi²
people per sq mile
Land Area
952
sq miles
Urban/Rural
Metro — 1M+ population
RUCC 1
How This FIPS Code Works
The 5-digit FIPS code 40081 is formed by combining the 2-digit state identifier 40 (Oklahoma) with the 3-digit county identifier 081. Together they uniquely identify Lincoln County in every US federal dataset. No two counties share the same 5-digit FIPS code.
Census ACS Data for FIPS 40081
From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 40081.
Median Household Income
$57,656
ACS B19013_001E
Poverty Rate
14.3%
ACS B17001 (below poverty level)
Median Age
41.0
ACS B01002_001E
Metropolitan Area
Adjacent Counties (6)
Counties that share a border with Lincoln County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 40081.
Federal Datasets Using Code 40081
FIPS code 40081 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 40081 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:081",
"in": "state:40",
"key": "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json() # [[header...], [Lincoln County, Oklahoma, income, pop, ...]-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '40081';
-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '40'
AND county_fips = '081';
-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 40081 is WRONG for this countylibrary(tidycensus)
get_acs(
geography = "county",
variables = c(income = "B19013_001E", pop = "B01003_001E"),
state = "40",
county = "081",
year = 2022
)ZIP Codes in Lincoln 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 Lincoln County. Why FIPS ≠ ZIP →
| ZIP Code | % in county |
|---|---|
| 74026 | 100.0% |
| 74875 | 100.0% |
| 74869 | 100.0% |
| 74834 | 100.0% |
| 74832 | 100.0% |
| 74824 | 91.6% |
| 74855 | 90.2% |
| 74881 | 87.6% |
| 74079 | 69.5% |
| 74864 | 61.9% |
| 74023 | 41.1% |
| 73045 | 39.5% |
| 74851 | 34.2% |
| 74059 | 28.8% |
| 73054 | 9.2% |
| 74028 | 0.6% |