The most people with last name
Garthwaite lives in:
| Janesville, WI | 4 |
| Indianapolis, IN | 3 |
| West Warwick, RI | 2 |
| Bellevue, WA | 2 |
| Maple Valley, WA | 2 |
| Allouez, WI | 2 |
| Beloit, WI | 2 |
| Blanchardville, WI | 2 |
| Dodgeville, WI | 2 |
| Fond Du Lac, WI | 2 |
| Footville, WI | 2 |
| Green Bay, WI | 2 |
| Hollandale, WI | 2 |
| Madison, WI | 2 |
| Moscow, WI | 2 |
| Oshkosh, WI | 2 |
| Rock, WI | 2 |
| Sussex, WI | 2 |
| Banning, CA | 1 |
| Hesperia, CA | 1 |
| Indian Wells, CA | 1 |
| Los Angeles, CA | 1 |
| Novato, CA | 1 |
| Rancho Mirage, CA | 1 |
| Rialto, CA | 1 |
| Riverside, CA | 1 |
| Santa Rosa, CA | 1 |
| Stamford, CT | 1 |
| Dover, DE | 1 |
| Hartly, DE | 1 |
| Naples, FL | 1 |
| Palm Harbor, FL | 1 |
| St. Pete Beach, FL | 1 |
| Alpharetta, GA | 1 |
| Chatham, IL | 1 |
| Springfield, IL | 1 |
| Boston, MA | 1 |
| Lynn, MA | 1 |
| Baltimore, MD | 1 |
| White Bear Lake, MN | 1 |
| Manhattan, MT | 1 |
| Charlotte, NC | 1 |
| Greensboro, NC | 1 |
| Sherrills Ford, NC | 1 |
| Lebanon, NH | 1 |
| Redmond, OR | 1 |
| Bellefonte, PA | 1 |
| Blue Bell, PA | 1 |
| Oreland, PA | 1 |
| Pottstown, PA | 1 |
| State College, PA | 1 |
| East Greenwich, RI | 1 |
| Pawtucket, RI | 1 |
| Dentsville, SC | 1 |
| Austin, TX | 1 |
| Centreville, VA | 1 |
| Vienna, VA | 1 |
| Auburn, WA | 1 |
| Adams, WI | 1 |
| Bagley, WI | 1 |
| Decatur, WI | 1 |
| Evansville, WI | 1 |
| Hayward, WI | 1 |
| Hillsboro, WI | 1 |
| Jefferson, WI | 1 |
| Johnstown, WI | 1 |
| Lac Du Flambeau, WI | 1 |
| Lomira, WI | 1 |
| Marion, WI | 1 |
| Neenah, WI | 1 |
| Platteville, WI | 1 |
| Sugar Creek, WI | 1 |
| Westport, WI | 1 |
