| Lakeside High School | |
| Streetaddress: | 6600 Sanborn Road |
| City: | Ashtabula |
| State: | Ohio |
| County: | (Ashtabula County) |
| Zipcode: | 44004 |
| Country: | United States |
| Coordinates: | 41.8444°N -80.8208°W |
| District: | Ashtabula Area City SD |
| Superintendent: | Lisa Newsome |
| Principal: | Douglas Wetherholt [1] |
| Teaching Staff: | 48.05 (FTE) |
| School Code: | 360-218 |
| Testname: | Ohio Graduation Test |
| Ratio: | 20.06 |
| Type: | Public, Coeducational |
| System: | ProgressBook(NEOMIN) |
| Grades: | 9-12 |
| Athletics: | Football, Basketball, Soccer, Golf, Track, Cross Country, Volleyball, Tennis |
| Conference: | Premier Athletic Conference |
| Rival: | Edgewood Warriors, Geneva Eagles |
| Mascot: | Dragon |
| Team Name: | Dragons [2] |
| Yearbook: | "The Legacy" |
| Newspaper: | "Dragon's Eye" |
| Enrollment: | 964 (2017–18)[3] |
Lakeside High School is located in Saybrook Township, near Ashtabula, Ohio, and is the only high school in the Ashtabula Area City School District. Formed in 2001, it was a merger of the two high schools which had previously existed in the district, Harbor High School and Ashtabula High School. For its first few years of operation, ninth-grade students were taught in the old Harbor High School, while 10th-12th grade students attended the old Ashtabula High School. In 2006, a new building was opened. This new building is the first of a total of seven new campus style school buildings to be erected in the area. The next to be built will be Lakeside Elementary School Campus School, which will be located a few miles away from the high school.