53033 FipsDecoder
41003 County FIPS Code

Benton County

Oregon · County seat: Corvallis · Active county or equivalent

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FIPS code 41003 is Benton County, Oregon. With a population of 95,615 (2022 ACS estimate), it ranks #11 in Oregon and #629 nationally. Benton County is part of the Corvallis, OR. The state FIPS code for Oregon is 41. This code is used in Census Bureau, BLS, EPA, HUD, and USDA federal datasets to identify this county.

County FIPS

41003

State FIPS

41

OR

Population

95,615

2022 ACS · #629 nationally

Density

141.5/mi²

people per sq mile

Land Area

676

sq miles

Urban/Rural

Metro — under 250K population

RUCC 3

How This FIPS Code Works

41 003
41 = State FIPS (Oregon)
003 = County FIPS

The 5-digit FIPS code 41003 is formed by combining the 2-digit state identifier 41 (Oregon) with the 3-digit county identifier 003. Together they uniquely identify Benton County in every US federal dataset. No two counties share the same 5-digit FIPS code.

Census ACS Data for FIPS 41003

From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 41003.

Median Household Income

$72,882

ACS B19013_001E

Poverty Rate

19.1%

ACS B17001 (below poverty level)

Median Age

33.5

ACS B01002_001E

Metropolitan Area

Adjacent Counties (4)

Counties that share a border with Benton County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 41003.

Federal Datasets Using Code 41003

FIPS code 41003 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 41003 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 41003
import requests

url = "https://api.census.gov/data/2022/acs/acs5"
params = {
    "get":  "NAME,B19013_001E,B01003_001E",
    "for":  "county:003",
    "in":   "state:41",
    "key":  "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json()  # [[header...], [Benton County, Oregon, income, pop, ...]
SQL — filtering by county FIPS 41003
-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '41003';

-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '41'
  AND county_fips = '003';

-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 41003 is WRONG for this county
R — tidycensus 41003
library(tidycensus)

get_acs(
  geography = "county",
  variables = c(income = "B19013_001E", pop = "B01003_001E"),
  state     = "41",
  county    = "003",
  year      = 2022
)
Zero-padding reminder: FIPS codes must always be stored and compared as zero-padded strings. 41 (not 41) and 003 (not 3) — losing the leading zeros is one of the most common data-join bugs in federal datasets. Full guide →

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

ZIP Code % in county
97331 100.0%
97330 100.0%
97456 96.9%
97370 93.7%
97333 89.5%
97324 77.4%
97326 38.9%
97321 31.3%
97361 10.8%
97448 5.6%

Other Counties in Oregon