ZIP code 51109: Sioux City, IA
51109 is a ZIP code in Sioux City, Iowa, mainly in Plymouth County, part of the Le Mars, IA micro area. About 3,606 people live here.
- Population
- 3,606
- Median household income
- $79,034
- Typical home value
- $175,800+4.9% in 12 months
- Median rent
- $627gross, per month
- Median age
- 39.4
- Homeowners
- 87%of occupied homes
Shaded: ZIP code 51109's area. Click anywhere on the map to see which ZIP code it's in.
ZIP codes within 10 milesWithin 25 miles
ZIP code 51109 details
| City | Sioux City |
|---|---|
| State | Iowa |
| County | Plymouth County (also partly Woodbury County) |
| Metro area | Le Mars, IA |
| Time zone | Central Time (UTC−6), observes daylight saving time |
| Type | Standard (delivery area) |
| Land area | 17.6 sq mi, plus 0.8 sq mi of water |
| Population density | 205 people per sq mi |
| Bachelor's degree or higher | 3.4% of adults 25+ |
| Average commute | 16.4 minutes |
| Center coordinates | 42.61033, -96.46998 |
Median rent in 51109 by bedrooms
| Size | Median gross rent |
|---|---|
| 1 bedroom | $550/mo |
| 2 bedrooms | $856/mo |
Gross rent includes utilities paid by the tenant. ACS 2020–2024; sizes with too few rentals to estimate are left out.
ZIP codes near 51109
| ZIP code | City | Distance | Population |
|---|---|---|---|
| 57038 | Jefferson, SD | 5.9 mi | 1,796 |
| 51104 | Sioux City, IA | 6.2 mi | 23,197 |
| 57049 | North Sioux City, SD | 6.3 mi | 7,962 |
| 51103 | Sioux City, IA | 6.3 mi | 16,895 |
| 51108 | Sioux City, IA | 6.7 mi | 5,960 |
| 51062 | Westfield, IA | 6.9 mi | 503 |
| 51105 | Sioux City, IA | 8.8 mi | 10,415 |
| 51101 | Sioux City, IA | 8.9 mi | 1,031 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Buying a home in 51109?
A typical home in ZIP code 51109 is worth about $175,800 (Zillow Home Value Index). The median household here earns $79,034 a year. See what buying here would cost per month, with Iowa average taxes and insurance filled in.
Monthly payment for a $175,800 homeWhat can a $79,034 income afford?Rental property numbers
About ZIP code 51109
What city is ZIP code 51109?
ZIP code 51109 is in Sioux City, IA, in Plymouth County.
What county is ZIP code 51109 in?
51109 is mainly in Plymouth County, Iowa, and partly in Woodbury County.
What is the population of ZIP code 51109?
About 3,606 people live in ZIP code 51109, according to the American Community Survey 2020–2024 5-year estimates.
What time zone is ZIP code 51109 in?
51109 is in Central Time (UTC−6). It observes daylight saving time.