Smith County
Mississippi · County seat: Raleigh · Active county or equivalent
FIPS code 28129 is Smith County, Mississippi. With a population of 14,310 (2022 ACS estimate), it ranks #57 in Mississippi and #2190 nationally. The state FIPS code for Mississippi is 28. This code is used in Census Bureau, BLS, EPA, HUD, and USDA federal datasets to identify this county.
County FIPS
28129
Population
14,310
2022 ACS · #2190 nationally
Density
22.5/mi²
people per sq mile
Land Area
636
sq miles
Urban/Rural
Nonmetro — rural, adjacent to metro
RUCC 8
How This FIPS Code Works
The 5-digit FIPS code 28129 is formed by combining the 2-digit state identifier 28 (Mississippi) with the 3-digit county identifier 129. Together they uniquely identify Smith County in every US federal dataset. No two counties share the same 5-digit FIPS code.
Census ACS Data for FIPS 28129
From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 28129.
Median Household Income
$51,983
ACS B19013_001E
Poverty Rate
18.2%
ACS B17001 (below poverty level)
Median Age
42.8
ACS B01002_001E
Adjacent Counties (7)
Counties that share a border with Smith County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 28129.
Federal Datasets Using Code 28129
FIPS code 28129 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 28129 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:129",
"in": "state:28",
"key": "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json() # [[header...], [Smith County, Mississippi, income, pop, ...]-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '28129';
-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '28'
AND county_fips = '129';
-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 28129 is WRONG for this countylibrary(tidycensus)
get_acs(
geography = "county",
variables = c(income = "B19013_001E", pop = "B01003_001E"),
state = "28",
county = "129",
year = 2022
)ZIP Codes in Smith 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 Smith County. Why FIPS ≠ ZIP →
| ZIP Code | % in county |
|---|---|
| 39153 | 100.0% |
| 39116 | 100.0% |
| 39152 | 65.0% |
| 39168 | 64.6% |
| 39422 | 28.6% |
| 39117 | 25.9% |
| 39111 | 21.0% |
| 39338 | 18.3% |
| 39074 | 16.8% |
| 39119 | 15.8% |
| 39092 | 6.0% |
| 39336 | 4.6% |
| 39042 | 1.3% |
| 39481 | 1.3% |
| 39114 | 0.0% |