Comparison to Surrounding Areas
The median household income ($46,125) for 18631 is less than 17815 ($67,510), 18603 ($60,352), 18635 ($73,480), Columbia County ($64,644), and Mifflin township ($61,250).
| 18631 | $46,125 |
| Mifflin township | $61,250 |
| Columbia County | $64,644 |
Get Median Household Income for all Zip Codes in Pennsylvania.
The average household income ($61,207) for 18631 is less than 17815 ($82,853), 18603 ($74,487), 18635 ($92,461), Columbia County ($81,045), and Mifflin township ($79,440).
| 18631 | $61,207 |
| Mifflin township | $79,440 |
| Columbia County | $81,045 |
Get Average Household Income for all Zip Codes in Pennsylvania.
The per-capita income for 18631 is $29,601. The per capita income ($29,601) for 18631 is less than 17815 ($32,419), 18603 ($33,105), 18635 ($39,155), Columbia County ($33,218), and Mifflin township ($34,749).
| 18631 | $29,601 |
| Mifflin township | $34,749 |
| Columbia County | $33,218 |
Get Per-Capita Income for all Zip Codes in Pennsylvania.
0% of households make over $200,000 a year. The percent high income households (0.0%) for 18631 is less than 17815 (5.0%), 18603 (4.9%), 18635 (6.7%), Columbia County (5.4%), and Mifflin township (4.0%).
| 18631 | 0.0% |
| Mifflin township | 4.0% |
| Columbia County | 5.4% |
Get High Income Households for all Zip Codes in Pennsylvania.
| under 25 years | 25 to 44 years | 45 to 64 years | 65 years and over | |
|---|---|---|---|---|
| 18631 | $-1 | $119,837 | $-1 | $31,375 |
| Mifflin township | $-1 | $121,806 | $87,917 | $43,839 |
| Columbia County | $39,523 | $82,401 | $78,358 | $42,596 |
Get Median Household Income by Age of Householder for all Zip Codes in Pennsylvania.
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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 18631 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+ | |||||
| 18631 | +/-$17,333 | +/-$12,509 | +/-$4,323 | +/-6.1% | +/-$-1 | +/-$41,394 | +/-$-1 | +/-$20,726 |
| Mifflin township | +/-$20,048 | +/-$10,004 | +/-$3,459 | +/-2.4% | +/-$-1 | +/-$17,840 | +/-$60,754 | +/-$14,945 |
| Columbia County | +/-$2,531 | +/-$2,508 | +/-$1,046 | +/-0.7% | +/-$16,669 | +/-$6,404 | +/-$2,705 | +/-$2,236 |