53033 FipsDecoder
53037 County FIPS Code

Kittitas County

Washington · County seat: Ellensburg · Active county or equivalent

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FIPS code 53037 is Kittitas County, Washington. With a population of 44,424 (2022 ACS estimate), it ranks #24 in Washington and #1098 nationally. Kittitas County is part of the Ellensburg, 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

53037

State FIPS

53

WA

Population

44,424

2022 ACS · #1098 nationally

Density

19.3/mi²

people per sq mile

Land Area

2,297

sq miles

Urban/Rural

Nonmetro — urban 20K+, adjacent to metro

RUCC 4

How This FIPS Code Works

53 037
53 = State FIPS (Washington)
037 = County FIPS

The 5-digit FIPS code 53037 is formed by combining the 2-digit state identifier 53 (Washington) with the 3-digit county identifier 037. Together they uniquely identify Kittitas County in every US federal dataset. No two counties share the same 5-digit FIPS code.

Census ACS Data for FIPS 53037

From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 53037.

Median Household Income

$66,800

ACS B19013_001E

Poverty Rate

14.5%

ACS B17001 (below poverty level)

Median Age

36.4

ACS B01002_001E

Metropolitan Area

Adjacent Counties (6)

Counties that share a border with Kittitas County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 53037.

Federal Datasets Using Code 53037

FIPS code 53037 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 53037 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 53037
import requests

url = "https://api.census.gov/data/2022/acs/acs5"
params = {
    "get":  "NAME,B19013_001E,B01003_001E",
    "for":  "county:037",
    "in":   "state:53",
    "key":  "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json()  # [[header...], [Kittitas County, Washington, income, pop, ...]
SQL — filtering by county FIPS 53037
-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '53037';

-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '53'
  AND county_fips = '037';

-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 53037 is WRONG for this county
R — tidycensus 53037
library(tidycensus)

get_acs(
  geography = "county",
  variables = c(income = "B19013_001E", pop = "B01003_001E"),
  state     = "53",
  county    = "037",
  year      = 2022
)
Zero-padding reminder: FIPS codes must always be stored and compared as zero-padded strings. 53 (not 53) and 037 (not 37) — losing the leading zeros is one of the most common data-join bugs in federal datasets. Full guide →

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

ZIP Code % in county
98950 100.0%
98941 100.0%
98943 100.0%
98946 100.0%
98922 100.0%
98925 100.0%
98926 100.0%
98934 100.0%
98940 100.0%
98068 55.1%
98828 8.9%
98901 8.7%

Other Counties in Washington