| Lansdowne High School | |
|---|---|
 | |
| Address | |
 | |
3800 Hollins Ferry Road , 21227 United States | |
| Coordinates | 39°14′39″N 76°39′03″W / 39.2443°N 76.6507°W |
| Information | |
| Type | Public high school |
| Motto | "What Did You Learn Today?" |
| Opened | 1963 |
| School district | Baltimore County Public Schools |
| Principal | Allison Seymour |
| Grades | 9-12 |
| Campus | Urban |
| Color(s) | Blue and red |
| Mascot | Vikings |
| Website | lansdownehs |
Lansdowne High School (LHS), formerly known as Lansdowne Sr. High School, and currently known as the Lansdowne High School Academy for Advanced Professional Studies, is a four-year public high school in Baltimore County, Maryland, United States.