| Koidu Girls Secondary School | |
| Established: | 1952 |
| Type: | Public School |
| Religious Affiliation: | Roman Catholic |
| City: | Koidu Town, |
| Country: | Sierra Leone |
| Gender: | Girls |
| Lower Age: | 13 |
| Upper Age: | 18 |
Koidu Girls Secondary School is a government-sponsored secondary school for girls located in Koidutown, Kono District, Sierra Leone. Koidu Girls Secondary School was founded in 1952 to educate the girls in Koidu Town. It is the most prominent girls secondary school in the Kono District and one of the most prominent in Sierra Leone.