Great Mills High School
| Name | Great Mills High School |
| Grades | Class 09 to Class 12 |
| Address | 21130 Great Mills Rd |
| City | Great Mills |
| School District | St. Mary's County Public Schools |
| County | St. Mary's County |
| Zipcode | 20634 |
| Phone No. | (301)863-4001 |
| State | Maryland |
| Suburb | Small |
| Students | 1713 |
| Teachers | 88 |
| Student Teacher Ratio | 19.4 students per teacher |
| Charter School | No |
| Magnet School | No |
Great Mills High School is located at 21130 Great Mills Rd in Great Mills city of St. Mary's County county in Maryland. This school comes under St. Mary's County Public Schools. You can call them at (301)863-4001 for more details. This is not a magnet school. Total one thousand seven hundred thirteen students from class 09 to class 12 study in this school who are taught by eighty eight teachers. This is not a charter school. The student teacher ratio of this school is 19.4.