States with most operating charter schools, November 2009
| California | 860 |
| Arizona | 566 |
| Florida | 413 |
| Texas | 387 |
| Ohio | 338 |
| Michigan | 283 |
| Wisconsin | 223 |
| Minnesota | 162 |
| Colorado | 166 |
| New York | 154 |
| Source: The Center for Education Reform | |
| California | 860 |
| Arizona | 566 |
| Florida | 413 |
| Texas | 387 |
| Ohio | 338 |
| Michigan | 283 |
| Wisconsin | 223 |
| Minnesota | 162 |
| Colorado | 166 |
| New York | 154 |
| Source: The Center for Education Reform | |