| RANK | COUNTY OR EQUIVALENT | ADHERENTS | |
| 1 | Los Angeles County, CA | 5,528,814 | |
| 2 | Cook County, IL | 3,098,473 | |
| 3 | Harris County, TX | 1,713,211 | |
| 4 | Kings County, NY | 1,552,336 | |
| 5 | Orange County, CA | 1,274,591 | |
| 6 | San Diego County, CA | 1,230,063 | |
| 7 | Dallas County, TX | 1,222,752 | |
| 8 | Maricopa County, AZ | 1,220,609 | |
| 9 | Middlesex County, MA | 1,078,903 | |
| 10 | New York County, NY | 1,075,375 | |
| 11 | Queens County, NY | 1,074,268 | |
| 12 | Nassau County, NY | 1,014,215 | |
| 13 | Suffolk County, NY | 964,721 | |
| 14 | Allegheny County, PA | 920,905 | |
| 15 | Bexar County, TX | 907,309 | |
| . . . | |||
| 3127 | Borden County, TX | 258 | |
| 3128 | Storey County, NV | 233 | |
| 3129 | Yakutat City and Borough, AK | 230 | |
| 3130 | Issaquena County, MS | 202 | |
| 3131 | San Juan County, CO | 188 | |
| 3132 | Loup County, NE | 184 | |
| 3133 | King County, TX | 180 | |
| 3134 | Kenedy County, TX | 170 | |
| 3135 | Petroleum County, MT | 167 | |
| 3136 | McPherson County, NE | 161 | |
| 3137 | Banner County, NE | 104 | |
| 3138 | Billings County, ND | 48 | |
| 3139 | Kalawao County, HI | 19 | |
| 3140 | Camas County, ID | 18 | |
| 3141 | Loving County, TX | 0 |