Research · PlainZIP analysis
Where Household Incomes Rose, ZIP by ZIP
Of the 18,536 residential ZIP codes whose boundary held and whose incomes can be compared, 2,643 (14.3%) saw median household income rise from 2015-2019 to 2020-2024 by more than the surveys' margins of error, in 2024 dollars; 892 (4.8%) saw it fall, and the rest cannot be told apart from no change. Chance alone would put about 927 ZIP codes on each side at this confidence even if nothing had changed: the rises are about 1,716 more than chance, the falls are within it.
Published October 9, 2026 by PlainZIP · written with AI tools from PlainZIP's database · figures passed the automated checks on October 9, 2026 · method
- Rose by more than the margins2,643
- No measurable change15,001
- Fell by more than the margins892
Where did incomes rise most?
The largest measured rise among ZIP codes of 5,000 or more people living in households is in 33890 (Zolfo Springs, FL): from $44,272 (2015-2019, in 2024 dollars) to $86,831, +96%. The full list, with the same test, is the ranking Where Household Incomes Rose Most.
The largest measured falls
| ZIP | Town | 2015-2019 | 2020-2024 | Change |
|---|---|---|---|---|
| 36089 | Union Springs, AL | $42,229 | $24,109 | -43% |
| 70426 | Angie, LA | $48,850 | $29,821 | -39% |
| 90014 | Los Angeles, CA | $49,866 | $31,000 | -38% |
| 77050 | Houston, TX | $59,509 | $37,009 | -38% |
| 70441 | Greensburg, LA | $63,346 | $39,438 | -38% |
| 39071 | Flora, MS | $82,726 | $54,700 | -34% |
| 70754 | Livingston, LA | $84,408 | $56,011 | -34% |
| 78256 | San Antonio, TX | $112,719 | $74,977 | -33% |
| 38075 | Whiteville, TN | $65,805 | $44,444 | -32% |
| 61606 | Peoria, IL | $57,624 | $39,196 | -32% |
| 24531 | Chatham, VA | $63,179 | $43,333 | -31% |
| 70807 | Baton Rouge, LA | $39,856 | $27,534 | -31% |
| 70070 | Luling, LA | $110,654 | $76,539 | -31% |
| 00707 | Maunabo, PR | $25,472 | $17,750 | -30% |
| 97002 | Aurora, OR | $100,449 | $70,137 | -30% |
Source: U.S. Census Bureau, ACS 2015-2019 and 2020-2024 5-year estimates (B19013, with margins of error); Census 2010-2020 ZCTA relationship file; BLS CPI-U.
By state
| State | Residential ZIPs | Tested | Rose | Fell | Share rising |
|---|---|---|---|---|---|
| Arizona | 417 | 140 | 57 | 4 | 40.7% |
| California | 1,802 | 835 | 290 | 16 | 34.7% |
| Washington | 605 | 307 | 96 | 7 | 31.3% |
| Idaho | 279 | 98 | 30 | 2 | 30.6% |
| Rhode Island | 81 | 52 | 15 | 1 | 28.8% |
| Florida | 1,013 | 634 | 181 | 6 | 28.5% |
| Utah | 298 | 69 | 19 | 2 | 27.5% |
| Nevada | 181 | 63 | 16 | 4 | 25.4% |
| Georgia | 751 | 448 | 108 | 9 | 24.1% |
| Puerto Rico | 132 | 83 | 19 | 6 | 22.9% |
| Oregon | 428 | 175 | 39 | 6 | 22.3% |
| Colorado | 527 | 214 | 47 | 7 | 22.0% |
| North Carolina | 853 | 549 | 94 | 16 | 17.1% |
| Tennessee | 636 | 422 | 72 | 15 | 17.1% |
| South Carolina | 424 | 295 | 48 | 15 | 16.3% |
| Michigan | 992 | 738 | 107 | 30 | 14.5% |
| New Mexico | 371 | 43 | 6 | 1 | 14.0% |
| Texas | 1,990 | 919 | 126 | 73 | 13.7% |
| Kentucky | 780 | 305 | 41 | 15 | 13.4% |
| Massachusetts | 539 | 405 | 54 | 20 | 13.3% |
| District of Columbia | 57 | 15 | 2 | 3 | 13.3% |
| Indiana | 807 | 554 | 70 | 34 | 12.6% |
| Wyoming | 179 | 16 | 2 | 1 | 12.5% |
| Minnesota | 881 | 626 | 77 | 37 | 12.3% |
| New York | 1,826 | 1,050 | 128 | 53 | 12.2% |
| Vermont | 265 | 117 | 14 | 4 | 12.0% |
| Montana | 369 | 86 | 10 | 3 | 11.6% |
| Wisconsin | 783 | 605 | 68 | 21 | 11.2% |
| Pennsylvania | 1,833 | 937 | 105 | 55 | 11.2% |
| Alabama | 656 | 380 | 42 | 15 | 11.1% |
| Nebraska | 586 | 274 | 30 | 14 | 10.9% |
| Connecticut | 288 | 227 | 24 | 12 | 10.6% |
| New Hampshire | 247 | 190 | 20 | 5 | 10.5% |
| Arkansas | 615 | 240 | 25 | 15 | 10.4% |
| Maine | 426 | 289 | 29 | 8 | 10.0% |
| New Jersey | 598 | 424 | 42 | 18 | 9.9% |
| Illinois | 1,396 | 940 | 93 | 59 | 9.9% |
| Ohio | 1,233 | 890 | 88 | 48 | 9.9% |
| Missouri | 1,035 | 603 | 59 | 28 | 9.8% |
| West Virginia | 738 | 148 | 14 | 9 | 9.5% |
| Delaware | 68 | 43 | 4 | 2 | 9.3% |
| South Dakota | 375 | 174 | 15 | 2 | 8.6% |
| Louisiana | 539 | 259 | 22 | 26 | 8.5% |
| Virginia | 903 | 483 | 41 | 34 | 8.5% |
| North Dakota | 388 | 131 | 11 | 11 | 8.4% |
| Oklahoma | 664 | 308 | 25 | 23 | 8.1% |
| Alaska | 245 | 67 | 5 | 7 | 7.5% |
| Iowa | 970 | 713 | 53 | 31 | 7.4% |
| Maryland | 477 | 291 | 21 | 21 | 7.2% |
| Kansas | 704 | 403 | 25 | 25 | 6.2% |
| Hawaii | 97 | 35 | 2 | 1 | 5.7% |
| Mississippi | 427 | 224 | 12 | 12 | 5.4% |
Source: U.S. Census Bureau, ACS 2015-2019 and 2020-2024 5-year estimates (B19013, with margins of error); Census 2010-2020 ZCTA relationship file; BLS CPI-U. (tables at data.census.gov)
Method and limits
ZIP codes whose 2020 ZCTA keeps at least 90% of its 2010 land (19,304 of them); 2015-2019 incomes multiplied by 1.22699 (BLS CPI-U, 2024 over 2019 annual averages); a change counts when it exceeds 1.645 standard errors of the difference, from both published margins (90% confidence: about 5% of unchanged ZIP codes cross the line on each side by chance, so single ZIP codes in the lists are evidence, not proof). Medians at the $250,000 cap are excluded. The lists rank ZIP codes of 5,000 or more people living in households; a state's tested share depends on how many of its ZIP codes kept their boundary between the 2010 and 2020 maps.
Every figure on this page is read from the PlainZIP database, built from the files named above; the same figures appear on each ZIP code's own page. The ZIP-level figures are one file: every ZIP code as CSV (columns on the methodology page).