| Native Name: | Луцька гімназія № 21 імені Михайла Кравчука |
| Caption: | School logo (seal) |
| Established: | 1986 |
| Schooltype: | Public school (Gymnasium) |
| Grades: | 1-11 |
| Enrollment: | approx. 1200 |
| Teaching Staff: | 110 |
| Streetaddress: | 14 Kravchuka str. |
| Coordinates: | 50.7669°N 25.3636°W |
| Language: | Ukrainian |
Lutsk Gymnasium # 21 after Mikhail Kravchuk (urkr. Луцька гімназія №21 імені Михайла Кравчука) is an elementary (grades 1–4), middle (grades 5–9) and high (grades 10–11) school with the specialization in some subjects, determined yearly according to the students' and parents' wishes, recommendations of senior teachers and a staff psychologist.
Teaching stuff includes 110 teachers, working in 8 subject streams.