| RANK | COUNTY OR EQUIVALENT | CONGREGATIONS | |
| 1 | Los Angeles County, CA | 4,044 | |
| 2 | Cook County, IL | 2,346 | |
| 3 | Harris County, TX | 1,587 | |
| 4 | Maricopa County, AZ | 1,552 | |
| 5 | Salt Lake County, UT | 1,369 | |
| 6 | Dallas County, TX | 1,233 | |
| 7 | San Diego County, CA | 1,179 | |
| 8 | King County, WA | 1,097 | |
| 9 | Orange County, CA | 1,085 | |
| 10 | Allegheny County, PA | 1,010 | |
| 11 | Utah County, UT | 991 | |
| 12 | Kings County, NY | 959 | |
| 13 | Wayne County, MI | 894 | |
| 14 | Queens County, NY | 884 | |
| 15 | Philadelphia County, PA | 876 | |
| . . . | |||
| 3117 | Gilpin County, CO | 3 | |
| 3117 | Clark County, ID | 3 | |
| 3117 | Issaquena County, MS | 3 | |
| 3117 | Petroleum County, MT | 3 | |
| 3117 | Hayes County, NE | 3 | |
| 3117 | Logan County, NE | 3 | |
| 3117 | Loup County, NE | 3 | |
| 3117 | Sioux County, NE | 3 | |
| 3117 | Storey County, NV | 3 | |
| 3117 | Billings County, ND | 3 | |
| 3117 | Slope County, ND | 3 | |
| 3117 | Kenedy County, TX | 3 | |
| 3117 | Piute County, UT | 3 | |
| 3130 | Alpine County, CA | 2 | |
| 3130 | Arthur County, NE | 2 | |
| 3130 | Banner County, NE | 2 | |
| 3130 | McPherson County, NE | 2 | |
| 3130 | Esmeralda County, NV | 2 | |
| 3130 | King County, TX | 2 | |
| 3130 | McMullen County, TX | 2 | |
| 3130 | Daggett County, UT | 2 | |
| 3138 | Kalawao County, HI | 1 | |
| 3138 | Camas County, ID | 1 | |
| 3138 | Borden County, TX | 1 | |
| 3141 | Loving County, TX | 0 |