St. Francois County
Missouri · County seat: Farmington · Active county or equivalent
FIPS code 29187 is St. Francois County, Missouri. With a population of 66,814 (2022 ACS estimate), it ranks #17 in Missouri and #804 nationally. St. Francois County is part of the Farmington, MO. The state FIPS code for Missouri is 29. This code is used in Census Bureau, BLS, EPA, HUD, and USDA federal datasets to identify this county.
County FIPS
29187
Population
66,814
2022 ACS · #804 nationally
Density
147.9/mi²
people per sq mile
Land Area
452
sq miles
Urban/Rural
Nonmetro — urban 20K+, adjacent to metro
RUCC 4
How This FIPS Code Works
The 5-digit FIPS code 29187 is formed by combining the 2-digit state identifier 29 (Missouri) with the 3-digit county identifier 187. Together they uniquely identify St. Francois County in every US federal dataset. No two counties share the same 5-digit FIPS code.
Census ACS Data for FIPS 29187
From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 29187.
Median Household Income
$53,083
ACS B19013_001E
Poverty Rate
17.6%
ACS B17001 (below poverty level)
Median Age
39.4
ACS B01002_001E
Metropolitan Area
Adjacent Counties (6)
Counties that share a border with St. Francois County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 29187.
Federal Datasets Using Code 29187
FIPS code 29187 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 29187 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:187",
"in": "state:29",
"key": "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json() # [[header...], [St. Francois County, Missouri, income, pop, ...]-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '29187';
-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '29'
AND county_fips = '187';
-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 29187 is WRONG for this countylibrary(tidycensus)
get_acs(
geography = "county",
variables = c(income = "B19013_001E", pop = "B01003_001E"),
state = "29",
county = "187",
year = 2022
)ZIP Codes in St. Francois 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 St. Francois County. Why FIPS ≠ ZIP →
| ZIP Code | % in county |
|---|---|
| 63601 | 100.0% |
| 63653 | 100.0% |
| 63637 | 100.0% |
| 63087 | 91.2% |
| 63628 | 84.0% |
| 63036 | 74.9% |
| 63640 | 66.1% |
| 63624 | 54.7% |
| 63650 | 21.5% |
| 63626 | 18.6% |
| 63645 | 8.3% |
| 63648 | 7.4% |
| 63630 | 6.7% |
| 63028 | 0.6% |
| 63020 | 0.0% |