Maryland public school districts ranked by the share of the district's schools that are charters. Districts need at least 2 schools and 500 students to qualify.
| # | District | State | Charter schools | % Charter schools |
|---|---|---|---|---|
| 1 | Baltimore City Public Schools | MD | 31 | 20.4% |
| 2 | Frederick County Public Schools | MD | 4 | 6.0% |
| 3 | Prince George's County Public Schools | MD | 10 | 5.0% |
| 4 | St. Mary's County Public Schools | MD | 1 | 3.8% |
| 5 | Charles County Public Schools | MD | 1 | 2.6% |
| 6 | Anne Arundel County Public Schools | MD | 2 | 1.6% |
| 7 | Baltimore County Public Schools | MD | 1 | 0.6% |