Annexation Methods in the 50 States
| Annexation Methods | States |
|---|---|
| Annexation by Petition (100% consent required) | Alabama, Alaska, Florida, Georgia, Idaho, Indiana, Iowa, Kansas, Kentucky, Louisiana, Missouri, North Carolina, Ohio, Oregon, South Carolina, Tennessee, Texas, Wisconsin |
| Annexation by Petition (<100% consent required) | Arizona, Arkansas, Colorado, Georgia, Idaho, Illinois, Indiana, Louisiana, Maryland, Mississippi, Montana, Nevada, New Mexico, North Dakota, Ohio, Oklahoma, Oregon, South Carolina, South Dakota, Texas, Utah, Washington, West Virginia, Wisconsin, Wyoming |
| Referendum May Be Required | Alabama, Alaska, Arkansas, Colorado, Delaware, Florida, Georgia, Illinois, Iowa, Kansas, Louisiana, Missouri, Montana, New York, North Carolina, Oregon, South Carolina, Texas, Washington, West Virginia, Wisconsin |
| Referendum May Be Petitioned For | California, Illinois, Kentucky, Maryland, Missouri, Ohio, South Carolina, South Dakota, Texas, Utah, Washington, Wisconsin |
| Unilateral Annexation | Idaho, Indiana, Nebraska |
| Third Party Approval of Annexation | California, Michigan, Minnesota, Mississippi, New Mexico, Virginia |
| No Annexations/No Unincorporated Territory | Connecticut, Hawaii, Maine, Massachusetts, New Hampshire, New Jersey, Pennsylvania, Rhode Island, Vermont |