Comparison to Surrounding Areas
The median household income ($58,942) for 99128 is less than the median household income for 83855 ($84,423), 99130 ($82,000), and 99158 ($78,375). But it's more than 83824 ($53,036), 99033 ($58,750), Whitman County ($55,406), and Farmington town ($53,750).
| 99128 | $58,942 |
| Farmington town | $53,750 |
| Whitman County | $55,406 |
Get Median Household Income for all Zip Codes in Washington.
The average household income ($79,788) for 99128 is less than the average household income for 83824 ($94,916), 83855 ($94,509), 99130 ($101,296), 99158 ($95,785), and Whitman County ($84,165). But it's more than 99033 ($77,051) and Farmington town ($61,900).
| 99128 | $79,788 |
| Farmington town | $61,900 |
| Whitman County | $84,165 |
Get Average Household Income for all Zip Codes in Washington.
The per-capita income for 99128 is $38,137. The per capita income ($38,137) for 99128 is less than the per capita income for 99158 ($38,310). But it's more than 83824 ($30,198), 83855 ($37,492), 99033 ($35,232), 99130 ($37,059), Whitman County ($34,326), and Farmington town ($34,047).
| 99128 | $38,137 |
| Farmington town | $34,047 |
| Whitman County | $34,326 |
Get Per-Capita Income for all Zip Codes in Washington.
9.6% of households make over $200,000 a year. The percent high income households (9.6%) for 99128 is less than the percent high income households for 83824 (15.7%) and 99130 (12.4%). But it's more than 83855 (6.7%), 99033 (3.4%), 99158 (6.6%), Whitman County (8.2%), and Farmington town (6.4%).
| 99128 | 9.6% |
| Farmington town | 6.4% |
| Whitman County | 8.2% |
Get High Income Households for all Zip Codes in Washington.
| under 25 years | 25 to 44 years | 45 to 64 years | 65 years and over | |
|---|---|---|---|---|
| 99128 | $-1 | $113,125 | $-1 | $53,750 |
| Farmington town | $-1 | $-1 | $-1 | $48,750 |
| Whitman County | $20,459 | $71,157 | $104,119 | $57,283 |
Get Median Household Income by Age of Householder for all Zip Codes in Washington.
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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 99128 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+ | |||||
| 99128 | +/-$13,124 | +/-$23,363 | +/-$8,732 | +/-5.7% | +/-$-1 | +/-$92,949 | +/-$-1 | +/-$15,290 |
| Farmington town | +/-$49,637 | +/-$24,930 | +/-$8,950 | +/-6.7% | +/-$-1 | +/-$-1 | +/-$-1 | +/-$35,478 |
| Whitman County | +/-$4,182 | +/-$5,353 | +/-$2,034 | +/-1.8% | +/-$2,520 | +/-$14,048 | +/-$17,576 | +/-$4,732 |