Cerro Gordo County
Iowa · County seat: Mason City · Active county or equivalent
FIPS code 19033 is Cerro Gordo County, Iowa. With a population of 42,979 (2022 ACS estimate), it ranks #13 in Iowa and #1131 nationally. Cerro Gordo County is part of the Mason City, IA. The state FIPS code for Iowa is 19. This code is used in Census Bureau, BLS, EPA, HUD, and USDA federal datasets to identify this county.
County FIPS
19033
Population
42,979
2022 ACS · #1131 nationally
Density
75.6/mi²
people per sq mile
Land Area
568
sq miles
Urban/Rural
Nonmetro — urban 20K+, not adjacent to metro
RUCC 5
How This FIPS Code Works
The 5-digit FIPS code 19033 is formed by combining the 2-digit state identifier 19 (Iowa) with the 3-digit county identifier 033. Together they uniquely identify Cerro Gordo County in every US federal dataset. No two counties share the same 5-digit FIPS code.
Census ACS Data for FIPS 19033
From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 19033.
Median Household Income
$63,149
ACS B19013_001E
Poverty Rate
9.3%
ACS B17001 (below poverty level)
Median Age
44.3
ACS B01002_001E
Metropolitan Area
Adjacent Counties (8)
Counties that share a border with Cerro Gordo County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 19033.
Federal Datasets Using Code 19033
FIPS code 19033 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 19033 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:033",
"in": "state:19",
"key": "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json() # [[header...], [Cerro Gordo County, Iowa, income, pop, ...]-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '19033';
-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '19'
AND county_fips = '033';
-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 19033 is WRONG for this countylibrary(tidycensus)
get_acs(
geography = "county",
variables = c(income = "B19013_001E", pop = "B01003_001E"),
state = "19",
county = "033",
year = 2022
)ZIP Codes in Cerro Gordo 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 Cerro Gordo County. Why FIPS ≠ ZIP →
| ZIP Code | % in county |
|---|---|
| 50467 | 100.0% |
| 50428 | 100.0% |
| 50401 | 100.0% |
| 50477 | 100.0% |
| 50469 | 100.0% |
| 50482 | 78.0% |
| 50479 | 72.5% |
| 50464 | 55.0% |
| 50433 | 52.9% |
| 50434 | 40.4% |
| 50458 | 35.7% |
| 50457 | 29.7% |
| 50468 | 24.7% |
| 50475 | 23.2% |
| 50449 | 9.9% |
| 50444 | 5.7% |
| 50456 | 1.9% |