53033 FipsDecoder
53029 County FIPS Code

Island County

Washington · County seat: Coupeville · Active county or equivalent

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FIPS code 53029 is Island County, Washington. With a population of 86,510 (2022 ACS estimate), it ranks #15 in Washington and #671 nationally. Island County is part of the Oak Harbor, 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

53029

State FIPS

53

WA

Population

86,510

2022 ACS · #671 nationally

Density

415.0/mi²

people per sq mile

Land Area

208

sq miles

Urban/Rural

Nonmetro — urban 20K+, adjacent to metro

RUCC 4

How This FIPS Code Works

53 029
53 = State FIPS (Washington)
029 = County FIPS

The 5-digit FIPS code 53029 is formed by combining the 2-digit state identifier 53 (Washington) with the 3-digit county identifier 029. Together they uniquely identify Island County in every US federal dataset. No two counties share the same 5-digit FIPS code.

Census ACS Data for FIPS 53029

From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 53029.

Median Household Income

$82,850

ACS B19013_001E

Poverty Rate

6.8%

ACS B17001 (below poverty level)

Median Age

44.2

ACS B01002_001E

Metropolitan Area

Adjacent Counties (5)

Counties that share a border with Island County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 53029.

Federal Datasets Using Code 53029

FIPS code 53029 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 53029 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 53029
import requests

url = "https://api.census.gov/data/2022/acs/acs5"
params = {
    "get":  "NAME,B19013_001E,B01003_001E",
    "for":  "county:029",
    "in":   "state:53",
    "key":  "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json()  # [[header...], [Island County, Washington, income, pop, ...]
SQL — filtering by county FIPS 53029
-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '53029';

-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '53'
  AND county_fips = '029';

-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 53029 is WRONG for this county
R — tidycensus 53029
library(tidycensus)

get_acs(
  geography = "county",
  variables = c(income = "B19013_001E", pop = "B01003_001E"),
  state     = "53",
  county    = "029",
  year      = 2022
)
Zero-padding reminder: FIPS codes must always be stored and compared as zero-padded strings. 53 (not 53) and 029 (not 29) — losing the leading zeros is one of the most common data-join bugs in federal datasets. Full guide →

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

ZIP Code % in county
98236 100.0%
98239 100.0%
98249 100.0%
98253 100.0%
98260 100.0%
98277 100.0%
98278 100.0%
98282 98.5%

Other Counties in Washington