Comparison to Surrounding Areas
The median household income ($76,525) for 51031 is less than the median household income for 51050 ($92,500), 51038 ($95,893), 51041 ($83,643), 51045 ($113,750), 51003 ($101,250), 51024 ($114,219), 51027 ($100,893), 51028 ($78,000), 51036 ($122,841), Sioux County ($86,098), Plymouth County ($83,251), and Oyens city ($100,625). But it's more than 51001 ($75,404), 51008 ($45,000), Craig city ($50,000), Le Mars city ($74,701), and Struble city ($59,375).
| 51031 | $76,525 |
| Craig city | $50,000 |
| Le Mars city | $74,701 |
| Oyens city | $100,625 |
| Struble city | $59,375 |
| Plymouth County | $83,251 |
| Sioux County | $86,098 |
Get Median Household Income for all Zip Codes in Iowa.
The average household income ($92,229) for 51031 is less than the average household income for 51050 ($116,488), 51038 ($100,639), 51041 ($100,229), 51045 ($122,717), 51003 ($114,618), 51024 ($121,897), 51027 ($112,634), 51028 ($100,107), 51036 ($111,331), Sioux County ($104,988), Plymouth County ($101,116), and Oyens city ($112,639). But it's more than 51001 ($90,658), 51008 ($56,407), Craig city ($64,458), Le Mars city ($90,260), and Struble city ($70,191).
| 51031 | $92,229 |
| Craig city | $64,458 |
| Le Mars city | $90,260 |
| Oyens city | $112,639 |
| Struble city | $70,191 |
| Plymouth County | $101,116 |
| Sioux County | $104,988 |
Get Average Household Income for all Zip Codes in Iowa.
The per-capita income for 51031 is $38,599. The per capita income ($38,599) for 51031 is less than the per capita income for 51050 ($42,233), 51036 ($50,649), 51045 ($46,541), 51001 ($40,845), 51003 ($44,417), 51024 ($48,658), 51028 ($41,829), Plymouth County ($41,532), and Oyens city ($44,670). But it's more than 51041 ($35,441), 51008 ($20,338), 51027 ($36,551), 51038 ($37,652), Sioux County ($37,166), Craig city ($32,624), Le Mars city ($37,904), and Struble city ($33,467).
| 51031 | $38,599 |
| Craig city | $32,624 |
| Le Mars city | $37,904 |
| Oyens city | $44,670 |
| Struble city | $33,467 |
| Plymouth County | $41,532 |
| Sioux County | $37,166 |
Get Per-Capita Income for all Zip Codes in Iowa.
6.3% of households make over $200,000 a year. The percent high income households (6.3%) for 51031 is less than the percent high income households for 51050 (9.3%), 51028 (7.5%), 51036 (8.1%), 51041 (10.4%), 51045 (16.7%), 51003 (12.1%), 51024 (9.5%), 51027 (13.0%), Sioux County (10.0%), Plymouth County (7.6%), Le Mars city (6.6%), and Oyens city (12.9%). But it's more than 51001 (4.8%), 51008 (0.0%), 51038 (3.4%), Craig city (0.0%), and Struble city (0.0%).
| 51031 | 6.3% |
| Craig city | 0.0% |
| Le Mars city | 6.6% |
| Oyens city | 12.9% |
| Struble city | 0.0% |
| Plymouth County | 7.6% |
| Sioux County | 10.0% |
Get High Income Households for all Zip Codes in Iowa.
| under 25 years | 25 to 44 years | 45 to 64 years | 65 years and over | |
|---|---|---|---|---|
| 51031 | $56,319 | $90,343 | $85,968 | $45,000 |
| Craig city | $-1 | $-1 | $76,875 | $-1 |
| Le Mars city | $62,702 | $88,983 | $86,754 | $42,768 |
| Oyens city | $-1 | $76,250 | $126,750 | $51,875 |
| Struble city | $-1 | $-1 | $-1 | $60,625 |
| Plymouth County | $53,250 | $92,702 | $102,267 | $56,204 |
| Sioux County | $43,750 | $100,981 | $104,955 | $60,475 |
Get Median Household Income by Age of Householder for all Zip Codes in Iowa.
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All income statistics above are the most current, comparable income statistics available from the US Census Bureau and are from the American Community Survey 2024 5-year estimates. You can find this information and other demographics for 51031 on the US Census Bureau’s website. These values are in 2024 inflation-adjusted dollars and were downloaded on 29 January 2026.
Margins of error for the income data are:
| Median Household Income | Average Household Income | Per Capita Income | High Income Households | Median Household Income by Age of Householder | ||||
|---|---|---|---|---|---|---|---|---|
| under 25 | 25 to 44 | 45 to 64 | 65+ | |||||
| 51031 | +/-$5,735 | +/-$7,462 | +/-$2,951 | +/-2.0% | +/-$13,011 | +/-$6,052 | +/-$17,780 | +/-$12,805 |
| Craig city | +/-$38,783 | +/-$22,100 | +/-$13,185 | +/-53.1% | +/-$-1 | +/-$-1 | +/-$73,851 | +/-$-1 |
| Le Mars city | +/-$5,737 | +/-$8,117 | +/-$3,255 | +/-2.2% | +/-$20,480 | +/-$7,704 | +/-$20,667 | +/-$12,857 |
| Oyens city | +/-$42,908 | +/-$36,766 | +/-$12,839 | +/-22.1% | +/-$-1 | +/-$70,696 | +/-$64,789 | +/-$45,665 |
| Struble city | +/-$12,402 | +/-$19,362 | +/-$11,701 | +/-45.3% | +/-$-1 | +/-$-1 | +/-$-1 | +/-$35,385 |
| Plymouth County | +/-$4,100 | +/-$4,760 | +/-$1,940 | +/-1.2% | +/-$8,054 | +/-$6,730 | +/-$10,727 | +/-$5,836 |
| Sioux County | +/-$7,089 | +/-$4,769 | +/-$1,361 | +/-1.5% | +/-$24,015 | +/-$6,602 | +/-$11,719 | +/-$4,877 |