Plymouth County, IA ZIP Codes
13 ZIP codes cover all or part of Plymouth County, Iowa. The Census Bureau counts 25,747 residents in the county, with a median household income of $83,251 and a median home value of $228,900. Median household income ranges from $75,404 in 51001 to $114,219 in 51024. Its largest communities include Sioux City, Le Mars, Remsen, Akron and Kingsley.
Plymouth County (Census county figures)
| Measure | Census figure |
|---|---|
| Residents | 25,747 |
| Households | 10,313 |
| Median household income | $83,251 |
| Median home value | $228,900 |
| Median age | 41.3 |
| Median rent | $910 |
All 13 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 35,893 |
| Households (sum of ZIP codes) | 14,114 |
| Median household income, range across ZIP codes | $75,404 (51001) to $114,219 (51024) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $82,588 |
| Homeowners | 76.9% |
| Households with kids under 18 | 32.2% |
| Moved in the past year | 8.8% |
| Carrier routes in EDDM2GO's route library | 18 routes, 5,250 homes (7 of 13 ZIP codes) |
Top facts
- Highest median household income in Plymouth County: 51024 ($114,219)
- Most residents: 51031 (12,808 people)
- Highest homeownership: 51038 (87.9% own their home)
- Most households with kids: 51027 (46.0% of households)
- Most new movers: 51001 (13.7% moved in last year)
- Youngest median age: 51027 (36.8 years)
- Highest median home value: 51024 ($347,800)
Every ZIP code in Plymouth County
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 51031 | Le Mars | 12,808 | 5,217 | $76,525 | $222,800 | 65.1% | 31.8% | 9.9% | — | — | 99% of its land |
| 51108 | Sioux City | 5,960 | 2,160 | $81,205 | $169,700 | 83.3% | 39.3% | 6.0% | 6 | 2,519 | 53% of its land |
| 51109 | Sioux City | 3,606 | 1,447 | $79,034 | $130,900 | 87.0% | 29.0% | 10.0% | — | — | 90% of its land |
| 51050 | Remsen | 2,962 | 1,062 | $92,500 | $219,700 | 85.9% | 35.8% | 5.9% | 3 | 761 | 99% of its land |
| 51001 | Akron | 2,342 | 1,041 | $75,404 | $192,700 | 76.1% | 24.6% | 13.7% | — | — | 60% of its land |
| 51028 | Kingsley | 2,191 | 904 | $78,000 | $219,600 | 83.4% | 24.9% | 10.0% | 3 | 650 | 80% of its land |
| 51024 | Hinton | 2,081 | 819 | $114,219 | $347,800 | 84.0% | 26.5% | 8.1% | 2 | 729 | 100% of its land |
| 51038 | Merrill | 1,449 | 553 | $95,893 | $183,100 | 87.9% | 33.6% | 3.3% | 2 | 404 | 100% of its land |
| 51027 | Ireton | 1,280 | 415 | $100,893 | $227,200 | 82.7% | 46.0% | 12.0% | — | — | 16% of its land |
| 51062 | Westfield | 503 | 240 | — | $250,000 | 87.5% | 25.8% | 3.6% | 1 | 202 | 100% of its land |
| 51048 | Pierson | 435 | 156 | $83,158 | $103,100 | 85.3% | 38.5% | 10.1% | 1 | 156 | 11% of its land |
| 51008 | Brunsville | 210 | 76 | $45,000 | $129,200 | 73.7% | 38.2% | 13.3% | — | — | 100% of its land |
| 51045 | Oyens | 66 | 24 | $113,750 | $170,000 | 91.7% | 20.8% | 1.5% | — | — | 100% of its land |
A ZIP code is listed for Plymouth County when at least 10% of its land is in the county, when it holds at least 10% of the county's land, or when the county is its main county. Totals add up whole ZIP codes, including parts that cross the county line; the Census county figures above do not.
Cities and communities
- Sioux City — 86,101 residents · 8 ZIP codes
- Le Mars — 10,640 residents · 1 ZIP code
- Remsen — 1,823 residents · 1 ZIP code
- Akron — 1,689 residents · 1 ZIP code
- Kingsley — 1,472 residents · 1 ZIP code
- Hinton — 931 residents · 1 ZIP code
- Merrill — 846 residents · 1 ZIP code
- Brunsville — 210 residents · 1 ZIP code
- Westfield — 123 residents · 1 ZIP code
- Oyens — 81 residents · 2 ZIP codes
- Struble — 76 residents · 1 ZIP code
- Craig — 49 residents · 1 ZIP code
Rankings
- Richest ZIP codes in Plymouth County — 9 ZIP codes ranked
- ZIP codes with the highest home values in Plymouth County — 9 ZIP codes ranked
- ZIP codes with the highest homeownership in Plymouth County — 9 ZIP codes ranked
- ZIP codes with the most families with kids in Plymouth County — 9 ZIP codes ranked
- ZIP codes with the most new movers in Plymouth County — 9 ZIP codes ranked
- Youngest ZIP codes in Plymouth County — 9 ZIP codes ranked
- Oldest ZIP codes in Plymouth County — 9 ZIP codes ranked
- Fastest-growing ZIP codes in Plymouth County — 9 ZIP codes ranked
Price a mailing to Plymouth County ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Plymouth County, IA?
- 51031, 51108, 51109, 51050, 51001, 51028, 51024, 51038, 51027, 51062, 51048, 51008 and 51045. Some cross the county line; the table shows each ZIP's share of land in the county.
- What is the population of Plymouth County?
- 25,747 residents in 10,313 households (ACS 5-year estimates, 2020–2024).
- What is the median household income in Plymouth County?
- $83,251 for the county as a whole. Its ZIP codes range from $75,404 (51001) to $114,219 (51024).
- Which Plymouth County ZIP code has the highest median household income?
- 51024, at $114,219, among ZIP codes with at least 1,000 residents. See the full ranking of Plymouth County ZIP codes by income.
- How many carrier routes and mailboxes are in Plymouth County?
- For the 7 of 13 ZIP codes in EDDM2GO's stored route library: 18 carrier routes reaching 5,250 residential and 169 business mailboxes. The route map loads the rest when you search them.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.