What are the fastest-growing counties in New Mexico?
Valencia County is the fastest-growing county in New Mexico: its population grew 1.40% a year from 2020 to 2025, to 82,013 residents (Census PEP Vintage 2025). Torrance County (1.35%) and Sandoval County (1.34%) follow. New Mexico as a whole grew 0.07% a year to 2,125,498 residents.
Data as of 2026-09-23. Population, growth and migration: PEP Vintage 2025 · 2020–2025. Income migration: IRS SOI 2022–2023 (2-yr lag).
Top 10 counties in New Mexico by population growth, 2020 to 2025
| Rank | County | Population | Growth (% per year) | Net domestic migration | Net international migration | IRS net AGI migration |
|---|---|---|---|---|---|---|
| 1 | Valencia County | 82,013 | 1.40% | +5,117 | +538 | +$32.1M |
| 2 | Torrance County | 16,100 | 1.35% | +1,334 | +4 | +$4.0M |
| 3 | Sandoval County | 159,565 | 1.34% | +10,255 | +1,091 | +$113.0M |
| 4 | Doña Ana County | 229,091 | 0.81% | +4,566 | +2,778 | +$14.8M |
| 5 | Otero County | 70,368 | 0.73% | -81 | +2,444 | -$9.9M |
| 6 | Santa Fe County | 156,907 | 0.24% | +1,318 | +2,898 | +$79.3M |
| 7 | Taos County | 34,564 | 0.06% | +689 | +375 | +$11.2M |
| 8 | Eddy County | 62,509 | 0.05% | -1,524 | +1,060 | -$25.2M |
| 9 | Lea County | 74,749 | 0.03% | -4,702 | +3,128 | -$26.1M |
| 10 | Los Alamos County | 19,407 | -0.01% | -503 | +363 | -$20.1M |
Where are people moving in New Mexico?
Sandoval County gained the most people from elsewhere in the United States: net domestic migration of +10,255 from 2020 to 2025 (Census PEP Vintage 2025). The table ranks every New Mexico place with 10,000 or more residents by that figure; the IRS column shows net adjusted gross income migration for 2022 to 2023.
| Rank | County | Population | Growth (% per year) | Net domestic migration | Net international migration | IRS net AGI migration |
|---|---|---|---|---|---|---|
| 1 | Sandoval County | 159,565 | 1.34% | +10,255 | +1,091 | +$113.0M |
| 2 | Valencia County | 82,013 | 1.40% | +5,117 | +538 | +$32.1M |
| 3 | Doña Ana County | 229,091 | 0.81% | +4,566 | +2,778 | +$14.8M |
| 4 | Torrance County | 16,100 | 1.35% | +1,334 | +4 | +$4.0M |
| 5 | Santa Fe County | 156,907 | 0.24% | +1,318 | +2,898 | +$79.3M |
| 6 | Sierra County | 11,395 | -0.29% | +761 | -2 | +$5.2M |
| 7 | Taos County | 34,564 | 0.06% | +689 | +375 | +$11.2M |
| 8 | Lincoln County | 19,844 | -0.46% | +134 | +45 | +$4.7M |
| 9 | Cibola County | 26,807 | -0.12% | +124 | +214 | -$0.2M |
| 10 | Colfax County | 12,184 | -0.28% | +67 | +169 | -$3.0M |
Go past the headline numbers
The interactive Demographics map layer and the full report for a single place are part of paid plans.
Get the Demographics Report for Valencia CountyFrequently asked questions
- What are the fastest-growing counties in New Mexico?
- By population growth from 2020 to 2025, the fastest are Valencia County (1.40% a year), Torrance County (1.35% a year), Sandoval County (1.34% a year), Doña Ana County (0.81% a year) and Otero County (0.73% a year) (Census PEP Vintage 2025). Only places with 10,000 or more residents are ranked.
- Where are people moving in New Mexico?
- By net domestic migration from 2020 to 2025, the largest gains are Sandoval County (+10,255), Valencia County (+5,117) and Doña Ana County (+4,566) (Census PEP Vintage 2025).
- How fast is New Mexico growing overall?
- New Mexico grew 0.07% a year from 2020 to 2025, to 2,125,498 residents, with net migration of +18,328 people (Census PEP Vintage 2025).
- Where does this New Mexico data come from, and how current is it?
- Population, growth and migration come from the U.S. Census Bureau Population Estimates Program (PEP Vintage 2025 · 2020–2025). Income migration comes from IRS Statistics of Income (IRS SOI 2022–2023 (2-yr lag)). Counties with fewer than 10,000 residents are not ranked (8 of 33 in New Mexico). Data last loaded 2026-09-23.
Data as of 2026-09-23: sources and periods
- Population, growth and migration
- U.S. Census Bureau, Population Estimates Program: PEP Vintage 2025 · 2020–2025. census.gov/programs-surveys/popest
- Income migration (net AGI)
- Internal Revenue Service, Statistics of Income migration data: IRS SOI 2022–2023 (2-yr lag). irs.gov/statistics/soi-tax-stats-migration-data
How to read the table
- Population is the Census July 1 estimate of the latest vintage.
- Growth is the compound annual rate over 2020 to 2025.
- Net domestic and international migration are cumulative people over 2020 to 2025.
- IRS net AGI migration is adjusted gross income that moved in, less what moved out, for 2022 to 2023. A plus sign means a net inflow.
- Places with fewer than 10,000 residents are left out of the rankings.