53033 FipsDecoder
53021 County FIPS Code

Franklin County

Washington · County seat: Pasco · Active county or equivalent

View on CensusDepth ↗

FIPS code 53021 is Franklin County, Washington. With a population of 96,692 (2022 ACS estimate), it ranks #14 in Washington and #625 nationally. Franklin County is part of the Kennewick-Richland, WA. The state FIPS code for Washington is 53. This code is used in Census Bureau, BLS, EPA, HUD, and USDA federal datasets to identify this county.

County FIPS

53021

State FIPS

53

WA

Population

96,692

2022 ACS · #625 nationally

Density

77.8/mi²

people per sq mile

Land Area

1,242

sq miles

Urban/Rural

Metro — 250K–1M population

RUCC 2

How This FIPS Code Works

53 021
53 = State FIPS (Washington)
021 = County FIPS

The 5-digit FIPS code 53021 is formed by combining the 2-digit state identifier 53 (Washington) with the 3-digit county identifier 021. Together they uniquely identify Franklin County in every US federal dataset. No two counties share the same 5-digit FIPS code.

Census ACS Data for FIPS 53021

From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 53021.

Median Household Income

$77,877

ACS B19013_001E

Poverty Rate

13.4%

ACS B17001 (below poverty level)

Median Age

30.6

ACS B01002_001E

Metropolitan Area

Adjacent Counties (6)

Counties that share a border with Franklin County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 53021.

Federal Datasets Using Code 53021

FIPS code 53021 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 53021 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.

Census ACS API — Python 53021
import requests

url = "https://api.census.gov/data/2022/acs/acs5"
params = {
    "get":  "NAME,B19013_001E,B01003_001E",
    "for":  "county:021",
    "in":   "state:53",
    "key":  "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json()  # [[header...], [Franklin County, Washington, income, pop, ...]
SQL — filtering by county FIPS 53021
-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '53021';

-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '53'
  AND county_fips = '021';

-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 53021 is WRONG for this county
R — tidycensus 53021
library(tidycensus)

get_acs(
  geography = "county",
  variables = c(income = "B19013_001E", pop = "B01003_001E"),
  state     = "53",
  county    = "021",
  year      = 2022
)
Zero-padding reminder: FIPS codes must always be stored and compared as zero-padded strings. 53 (not 53) and 021 (not 21) — losing the leading zeros is one of the most common data-join bugs in federal datasets. Full guide →

ZIP Codes in Franklin 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 Franklin County. Why FIPS ≠ ZIP →

ZIP Code % in county
99335 100.0%
99330 100.0%
99301 100.0%
99343 100.0%
99326 87.9%
99371 21.0%
99344 15.7%

Other Counties in Washington