| County | Avg. Annual Net Mig |
|---|---|
| Clark County, Nevada | -11,338 |
| Maricopa County, Arizona | -7,965 |
| Harris County, Texas | -4,364 |
| Multnomah County, Oregon | -3,312 |
| Tarrant County, Texas | -3,074 |
| Washoe County, Nevada | -3,070 |
| Dallas County, Texas | -2,812 |
| Pima County, Arizona | -2,543 |
| Salt Lake County, Utah | -2,296 |
| Washington County, Oregon | -2,141 |
