The median income of San Juan County residents was an inflation-adjusted $23,765 per year. San Juan County had 41,999 households in 2017, with a population of 128,221.
The county with the highest median resident income in the state was Los Alamos County. Los Alamos County's median income was $57,089 per year after adjusting for inflation – $33,324 more than San Juan County. It had 7,525 households in 2017 and a population of 18,031.
Mora County had the lowest annual resident income among counties in New Mexico, with a median income of only $12,481 per year. That was $11,284 less than the median income in San Juan County at the time. Mora County had 1,513 households in 2017 and a population of 4,605.
The table below shows the state's counties ranked by median annual resident earnings in 2017.
| Rank | County | Earnings per resident ($$$) |
|---|---|---|
| 1 | Los Alamos County | 57,089 |
| 2 | Santa Fe County | 31,563 |
| 3 | Sandoval County | 30,086 |
| 4 | Eddy County | 29,418 |
| 5 | Bernalillo County | 27,343 |
| 6 | Lea County | 27,286 |
| 7 | San Juan County | 23,765 |
| 8 | Rio Arriba County | 23,169 |
| 9 | Curry County | 22,930 |
| 10 | Valencia County | 22,541 |
| 11 | Lincoln County | 22,534 |
| 12 | Union County | 22,464 |
| 13 | Catron County | 22,455 |
| 14 | Grant County | 21,794 |
| 15 | De Baca County | 21,553 |
| 16 | Chaves County | 21,286 |
| 17 | Otero County | 21,127 |
| 18 | Harding County | 20,871 |
| 19 | Taos County | 20,470 |
| 20 | Cibola County | 19,514 |
| 21 | Doña Ana County | 19,497 |
| 22 | Torrance County | 19,294 |
| 23 | Colfax County | 19,018 |
| 24 | Hidalgo County | 18,930 |
| 25 | Roosevelt County | 18,579 |
| 26 | San Miguel County | 17,627 |
| 27 | Quay County | 17,532 |
| 28 | Guadalupe County | 17,520 |
| 29 | Sierra County | 17,136 |
| 30 | McKinley County | 16,344 |
| 31 | Socorro County | 15,608 |
| 32 | Luna County | 15,270 |
| 33 | Mora County | 12,481 |
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