| Harford Lutheran School | |
| Established: | 2002 |
| Closed: | 2009 |
| Type: | Private secondary |
| Status: | Closed |
| Headmaster: | Randall Gast |
| Head Name: | Second Master |
| Head Name2: | Assistant Headmaster |
| Enrollment: | 110 |
| Grades: | 6–12 |
| City: | Bel Air |
| State: | Maryland |
| Country: | United States |
| Campus: | Suburban |
| Colors: | Blue and white |
| Mascot: | Knights |
| Free Label: | Emblem |
Harford Lutheran School was a private secondary school located in Bel Air, Maryland, United States.
The school was operated by the Baltimore Lutheran High School Association, an association of Lutheran churches in the Baltimore area.https://web.archive.org/web/20070406080022/http://www.baltimorelutheran.org/aboutlutherans/index.php The Association opened its first campus, Baltimore Lutheran School, in suburban Towson in 1965. Movement to Harford County and growth of the Towson campus moved the Association to open a second campus in 2002.
Harford Lutheran School had students from grades 6 through 12. Harford Lutheran closed in June 2009, with only one graduating class.