Comparison to Surrounding Areas
The median household income ($64,892) for 37721 is less than the median household income for 37709 ($75,799), 37918 ($69,752), 37924 ($80,112), 37938 ($84,135), and Knox County ($74,222). But it's more than 37779 ($51,357), 37806 ($59,605), 37807 ($62,673), Union County ($62,727), and Plainview city ($63,965).
| 37721 | $64,892 |
| Plainview city | $63,965 |
| Knox County | $74,222 |
| Union County | $62,727 |
Get Median Household Income for all Zip Codes in Tennessee.
The average household income ($85,365) for 37721 is less than the average household income for 37709 ($90,213), 37918 ($87,444), 37924 ($89,151), 37938 ($121,357), and Knox County ($104,460). But it's more than 37779 ($70,812), 37806 ($78,939), 37807 ($71,542), Union County ($75,767), and Plainview city ($72,022).
| 37721 | $85,365 |
| Plainview city | $72,022 |
| Knox County | $104,460 |
| Union County | $75,767 |
Get Average Household Income for all Zip Codes in Tennessee.
The per-capita income for 37721 is $33,223. The per capita income ($33,223) for 37721 is less than the per capita income for 37709 ($33,898), 37806 ($34,456), 37918 ($37,230), 37924 ($35,301), 37938 ($49,978), and Knox County ($43,351). But it's more than 37779 ($27,888), 37807 ($27,799), Union County ($29,443), and Plainview city ($27,011).
| 37721 | $33,223 |
| Plainview city | $27,011 |
| Knox County | $43,351 |
| Union County | $29,443 |
Get Per-Capita Income for all Zip Codes in Tennessee.
5% of households make over $200,000 a year. The percent high income households (5.0%) for 37721 is less than the percent high income households for 37918 (6.2%), 37938 (13.1%), and Knox County (10.8%). But it's more than 37709 (4.8%), 37779 (0.3%), 37807 (3.8%), 37924 (3.9%), Union County (4.3%), and Plainview city (3.3%). And it's the same as 37806 (5.0%).
| 37721 | 5.0% |
| Plainview city | 3.3% |
| Knox County | 10.8% |
| Union County | 4.3% |
Get High Income Households for all Zip Codes in Tennessee.
| under 25 years | 25 to 44 years | 45 to 64 years | 65 years and over | |
|---|---|---|---|---|
| 37721 | $-1 | $64,257 | $85,551 | $45,837 |
| Plainview city | $-1 | $63,828 | $77,438 | $41,500 |
| Knox County | $36,934 | $81,342 | $92,324 | $56,033 |
| Union County | $38,750 | $70,929 | $67,218 | $42,315 |
Get Median Household Income by Age of Householder for all Zip Codes in Tennessee.
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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 37721 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+ | |||||
| 37721 | +/-$5,918 | +/-$7,026 | +/-$2,515 | +/-2.4% | +/-$-1 | +/-$6,608 | +/-$14,132 | +/-$5,234 |
| Plainview city | +/-$7,139 | +/-$7,054 | +/-$3,005 | +/-2.3% | +/-$-1 | +/-$20,193 | +/-$8,174 | +/-$16,723 |
| Knox County | +/-$1,390 | +/-$2,056 | +/-$779 | +/-0.5% | +/-$2,658 | +/-$2,038 | +/-$3,711 | +/-$2,291 |
| Union County | +/-$3,883 | +/-$6,187 | +/-$2,132 | +/-2.1% | +/-$26,142 | +/-$14,662 | +/-$8,826 | +/-$11,327 |