| MSA Name | MSA Abbreviation | Percent in 2010 of 1-Only Households | Percent in 2010 of 4 or More Households |
| ANCHORAGE, AK | AC | 23.68% | 25.04% |
| ANN ARBOR, MI | AA | 30.40% | 20.10% |
| BOULDER‑LONGMONT, CO | BL | 28.90% | 20.40% |
| BREMERTON-SILVERDALE, WA | BS | 25.20% | 22.00% |
| MANCHESTER, NH | MC | 24.00% | 24.40% |
| NORWICH-NEW LONDON, CT | NN | 26.90% | 21.80% |
| SANTA CRUZ‑WATSONVILLE, CA | SW | 26.10% | 24.10% |
| TRENTON, NJ | TR | 26.70% | 25.50% |
| VALLEJO‑FAIRFIELD‑NAPA, CA | VF | 22.30% | 29.00% |
| YORK-HANOVER, PA | YH | 23.60% | 22.40% |
| Minimum (of all Mid-Small MSAs) | 14.10% | 16.18% | |
| Low Normal = average minus standard deviation of all Mid-Small MSAs | 23.43% | 16.99% | |
| Median (of all Mid-Small MSAs) | 27.31% | 21.03% | |
| High Normal = average plus standard deviation of all Mid-Small MSAs | 30.10% | 27.70% | |
| Maximum (of all Mid-Small MSAs) | 32.41% | 47.20% | |