Map the Block › Places › Iowa › Plymouth County
Plymouth County, Iowa in numbers: crime, income, hazards
FBI reports put Plymouth County at 1.1 violent crimes per 1,000 people a year over 2021-2025, 59% lower than the rate for Iowa (2.7). Median household income is $83,251 and the unemployment rate was 2.8% in August 2026. Population: about 25,747 (Census, 2020-2024).
Last updated . Crime: FBI 2021-2025. Income and housing: Census ACS 2020-2024. Unemployment: BLS August 2026. Road work: October 11, 2026.
Also on the map: income · hazard risk · Superfund · dams
What is the crime rate in Plymouth County?
From 2021 through 2025, Plymouth County averaged 28 reported violent crimes a year, along with 114 property crimes. Per 1,000 residents, the violent-crime rate works out to 1.1: 59% lower than the Iowa rate (2.7), and 70% lower than the national rate (3.7). For property crime the county rate is 4.4 per 1,000 (Iowa: 13.6; U.S.: 18.1).
| Offense (yearly average, 2021-2025) | Plymouth County | Per 1,000 | Iowa per 1,000 | U.S. per 1,000 |
|---|---|---|---|---|
| Violent crime | 28 | 1.1 | 2.7 | 3.7 |
| Murder | 0 | 0.00 | 0.02 | 0.06 |
| Rape | 6 | 0.23 | 0.42 | 0.40 |
| Robbery | 0 | 0.00 | 0.20 | 0.62 |
| Aggravated assault | 21 | 0.82 | 2.0 | 2.6 |
| Property crime | 114 | 4.4 | 13.6 | 18.1 |
| Burglary | 12 | 0.47 | 2.2 | 2.4 |
| Larceny-theft | 91 | 3.5 | 9.9 | 13.0 |
| Motor vehicle theft | 10 | 0.40 | 1.5 | 2.6 |
Most crime never reaches the police, so these are reported crimes, a floor rather than the full count. In 2024 about half of violent crimes (48%) and about 3 in 10 property crimes (31%) were reported to police (U.S. Justice Department, National Crime Victimization Survey). Rates also depend on how completely each agency reports to the FBI. County figures add up the city police and sheriff reports in the county (2 agencies; 100% of residents covered).
What is the median household income in Plymouth County?
Median household income is $83,251, 11% higher than the statewide figure ($75,059). Owner-occupied homes have a median value of $228,900, and the median rent is $910 a month. 6.6% of households received SNAP benefits in the past year (state: 8.8%). The newest monthly figure from the Bureau of Labor Statistics is 2.8% for August 2026 (preliminary), with 404 people out of work and looking.
| Census ACS 2020-2024 | Plymouth County | Iowa | United States |
|---|---|---|---|
| Population | 25,747 | 3,210,507 | 334,922,499 |
| Median household income | $83,251 | $75,059 | $80,734 |
| Median home value (owner-occupied) | $228,900 | $208,000 | $332,700 |
| Median gross rent | $910 | $972 | $1,413 |
| Unemployment rate (2020-2024 average) | 2.2% | 3.6% | 5.2% |
| People below the poverty line | 6.9% | 11.1% | 12.5% |
| Households receiving SNAP (food stamps) | 6.6% | 8.8% | 12.1% |
| Adults 25+ with a bachelor's degree or higher | 21.7% | 31.4% | 35.7% |
| Homeowner households | 73.6% | 71.7% | 65.2% |
| Median age | 41.3 | 38.6 | 38.9 |
| Households with broadband internet | 89.8% | 88.9% | 91.0% |
| People without health insurance | 5.3% | 5.0% | 8.4% |
What natural hazards and environmental sites are in Plymouth County?
On FEMA's National Risk Index, Plymouth County has an overall natural-hazard risk rating of “Relatively Low”. None of the seven hazards on our map (floods, wildfire, tornadoes, heat, earthquakes, hurricanes) is rated above “Relatively Moderate” here. The index compares counties with each other and also weighs how vulnerable and resilient a community is, so it is a long-run estimate, not a forecast.
Superfund sites
1 Superfund site is on or proposed for EPA's National Priorities List in Plymouth County: Highway 3 Pce. A listing means EPA is managing a long-term cleanup; it does not by itself mean anyone is exposed today.
High-hazard dams
Plymouth County has 4 dams classed as high hazard in the National Inventory of Dams. 2 are rated Poor or Unsatisfactory in condition, 2 Satisfactory or Fair. The two tallest are Deer Creek Dam (55 ft) and Held Watershed Site E-3 (43 ft). “High hazard” describes what lies downstream (people would probably die if the dam failed), not how likely the dam is to fail.
Industrial chemical releases
6 facilities in the county filed Toxics Release Inventory reports for 2024, together reporting 24,998 pounds of listed chemicals released on site. Reported releases are legal permitted amounts in most cases.
Disasters, air and water
Plymouth County was covered by 2 federal major disaster declarations from 2016 through 2025 (Severe Storm 1, Flood 1), not counting COVID-19. Of 10 community water systems, none had an open health-based drinking-water violation in EPA's records (September 2026). EPA puts the county in radon zone 1 (highest). NHTSA counted 6 traffic deaths in the county in 2024.
Is there road construction in Plymouth County?
Plymouth County had 5 highway work zones in the October 11, 2026 feed from the state DOT (0 active that day). Where crews are working: IA-12. The map's construction layer is refreshed every morning.
See today's work zones on the map →
How many schools, nursing homes and parks are in Plymouth County?
Federal school lists show 16 public and 3 private schools in the county. 5 nursing homes are certified by Medicare or Medicaid here; star ratings for each are on the map and on Medicare's Care Compare. USGS mapping shows 8 fire or EMS stations and 5 police or sheriff stations. 1 state park or recreation area: Stone State Recreation Area.
Gun shops, liquor stores and Planned Parenthood in Plymouth County
Gun shops
One gun shop with a public storefront is on the map in Plymouth County, plus 7 more licensed dealers without a public storefront (not shown). On the ATF list: Small Town Sportsman (Kingsley).
Liquor stores
One liquor store is on the map in Plymouth County: Cork It! (Le Mars). Iowa has no complete public liquor licence list we can use, so this count also draws on OpenStreetMap and Overture Maps and may miss some stores or include closed ones.
Planned Parenthood
There is no Planned Parenthood health center in Plymouth County on the map.
See them on the map: gun shops · liquor stores →
Sources: ATF licensee list (Sept 2026); state liquor licence lists, OpenStreetMap and Overture Maps (non-official; partial in some states); HHS Title X directory and CMS NPPES.
Common questions
What is the crime rate in Plymouth County?
Plymouth County averaged 28 reported violent crimes a year in 2021-2025, or 1.1 per 1,000 residents, 59% lower than the Iowa rate (2.7). The property-crime rate was 4.4 per 1,000 (FBI Uniform Crime Reporting).
What is the median household income in Plymouth County?
$83,251 (Census American Community Survey, 2020-2024 average), compared with $75,059 for Iowa and $80,734 nationally.
What is the unemployment rate in Plymouth County?
The newest monthly figure from the Bureau of Labor Statistics is 2.8% for August 2026 (preliminary), with 404 people out of work and looking.
What natural hazards affect Plymouth County?
On FEMA's National Risk Index, Plymouth County has an overall natural-hazard risk rating of “Relatively Low”. None of the seven hazards on our map (floods, wildfire, tornadoes, heat, earthquakes, hurricanes) is rated above “Relatively Moderate” here.
Are there Superfund sites in Plymouth County?
1 Superfund site is on or proposed for EPA's National Priorities List in Plymouth County: Highway 3 Pce.
Is there road construction in Plymouth County right now?
Plymouth County had 5 highway work zones in the October 11, 2026 feed from the state DOT (0 active that day). Where crews are working: IA-12.
How many nursing homes are in Plymouth County?
5 Medicare- or Medicaid-certified nursing homes (CMS provider data, September 2026).
How does Plymouth County compare with neighboring counties?
| County | Population | Violent crimes per 1,000 (2021-25) | Median household income |
|---|---|---|---|
| Cherokee County | 11,600 | 0.98 | $71,269 |
| O'Brien County | 14,126 | 2.3 | $68,356 |
| Sioux County | 36,212 | 0.71 | $86,098 |
| Union County, SD | 17,081 | 1.2 | $89,636 |
| Woodbury County | 106,247 | 4.9 | $73,658 |
More: Iowa statewide numbers · Sex-offender registry search (U.S. Justice Department, NSOPW)
Where do these numbers come from?
- Crime: FBI Uniform Crime Reporting 2021-2025 (agency level, Return A), averaged and summed by county by Map the Block; Census population; state and national rates: FBI estimated crimes 2021-2025.
- Income, housing, education: U.S. Census Bureau, American Community Survey 2020-2024 5-year, table B19013 (median household income) and related tables.
- Monthly unemployment: U.S. Bureau of Labor Statistics, Local Area Unemployment Statistics (LAUS), county data, not seasonally adjusted. Public domain.
- Hazards: FEMA National Risk Index v1.20 (December 2025), county scores; disasters: FEMA OpenFEMA Disaster Declarations Summaries.
- Superfund: U.S. EPA, Superfund site boundaries and NPL status (October 2026). Dams: U.S. Army Corps of Engineers, National Inventory of Dams (public map service, October 2026). Chemical releases: U.S. EPA Toxics Release Inventory, reporting year 2024 (basic data file).
- Air and water: U.S. EPA AirData, annual AQI by county 2024; EPA Air Quality Design Values 2023-2025 (June 2026); U.S. EPA SDWIS via ECHO drinking-water download (September 30, 2026). Traffic deaths: NHTSA Fatality Analysis Reporting System (FARS) 2024; Census population.
- Work zones: State departments of transportation, via the U.S. DOT Work Zone Data Exchange (WZDx) and state 511 feeds; refreshed every morning (snapshot October 11, 2026).
- Schools: National Center for Education Statistics, EDGE public school locations 2024-25; budgets: U.S. Census Bureau, Annual Survey of School System Finances, fiscal year 2024; National Center for Education Statistics, EDGE Private School geocodes (Private School Survey 2023-24). Nursing homes: U.S. Centers for Medicare & Medicaid Services, Nursing Home Provider Information and Penalties (September 2026). Stations: U.S. Geological Survey, National Structures Dataset (Fire Stations/EMS Stations), October 2026 pull.
- Parks: USGS Protected Areas Database of the U.S. (PAD-US 4.1); state park agencies' open data (CA, NY, PA, TN, TX, FL, NJ, KY, HI, UT, MT and others); OpenStreetMap contributors for some hours, phones, fees and camping; U.S. National Park Service: unit boundaries (Land Resources Division), Acreage Report (Sept 30, 2026), park pages on nps.gov (hours, fees), Visitor Use Statistics (2025).
Map the Block shows public statistics about places, not people, and does not rate or rank neighborhoods as places to live. Figures are as published by each source; check the source before relying on a number.
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