Marietta Middle School, 121 Winn St. NW: grades 7 and 8, 1,487 students and a 78.6 CCRPI score in the state's 2025 report. Office: 770-422-0311.
Last checked Oct. 5, 2026. Sources: Marietta Middle School, Marietta City Schools, the state’s 2025 School Grades data and the federal NCES school directory.
Marietta Middle School is the only middle school in Marietta City Schools. It teaches seventh and eighth graders on Winn Street, northwest of Marietta Square and inside the city limits. Every address in the district is zoned to it.
Who to call
- Front office: 770-422-0311, 121 Winn St. NW, Marietta, GA 30064
- School website: mms.marietta-city.org
- Enrolling a new student: the district’s student registration page; questions go to Strategy and Innovation, 770-422-3500, ext. 7297
- Buses: Marietta City Schools Transportation, 770-429-3110
- District main line: 770-422-3500
| Address | 121 Winn St. NW, Marietta, GA 30064 |
| Phone | 770-422-0311 |
| Grades | 7 and 8 |
| District | Marietta City Schools |
Principal
Principal Diona Brown, according to the school’s Meet the Principal page. In her welcome she writes that she was the 2014-15 Teacher of the Year at Northwestern Middle School in Fulton County and later worked at Park Street Elementary, where she was involved in designing and opening the new school building.
Enrollment and teachers
- Federal count: 1,302 students in the 2023-24 school year, with 99 full-time-equivalent teachers, according to the NCES directory. That works out to about 13 students per teacher.
- State count: 1,487 students in the state’s 2025 School Grades report, compared with 1,475 in 2024 and 1,471 in 2023.
State report card
Georgia grades schools with the College and Career Ready Performance Index (CCRPI), which the Georgia Department of Education calls “Georgia’s annual tool for measuring how well schools, districts, and the state are preparing students for the next educational level,” according to its accountability page. Scores run from 0 to 100. Georgia does not issue letter grades.
| Report year | CCRPI score |
|---|---|
| 2025 | 78.6 |
| 2024 | 80.8 |
| 2023 | 70.2 |
The 2025 score breaks down into content mastery 70.7, progress 81.3, closing gaps 82.4 and readiness 82.9, each a component score out of 100. In reading, 59.5% of eighth graders scored at or above the midpoint of the state’s grade-level Lexile range.
Georgia Milestones, 2025 end-of-grade tests (share of tested students at the proficient and distinguished levels):
| Subject | Proficient | Distinguished |
|---|---|---|
| English language arts | 35% | 11.9% |
| Math | 31.3% | 17.5% |
| Science (eighth grade) | 32.7% | 12.3% |
| Social studies (eighth grade) | 30.3% | 16.8% |
See the full report on the state’s School Grades page for Marietta Middle or on GaDOE’s CCRPI reporting site. Both are interactive dashboards; the figures above come from the state’s downloadable data file.
Attendance zone and feeder schools
Marietta City Schools serves the homes inside the city limits. Look up an address with the City of Marietta’s property search tool, which the district uses for school zones, or see the district attendance zone map (PDF). A Marietta mailing address outside the city is generally in the Cobb County School District.
The district’s charter system page lists one sixth grade academy, one middle school and one high school:
- Before Marietta Middle: sixth grade at the Marietta Sixth Grade Academy, which takes students from all seven elementary schools and the Marietta Center for Advanced Academics.
- After Marietta Middle: Marietta High.
We found no rezoning approved by the Board of Education that affects the school.
Calendar
From the district’s 2026-27 calendar (PDF):
- Oct. 19-23: conference week for Marietta Middle, the Sixth Grade Academy and MCAA, with dismissal at 1:15 p.m.
- Nov. 23-27: Thanksgiving break
- Friday, Dec. 18: end of the first semester
- Dec. 21 to Jan. 1, 2027: holiday break
- Feb. 16-19: winter break, after Presidents’ Day on Monday, Feb. 15
The district’s school calendars page can be filtered by school. The school does not publish its bell times on its public pages.
Programs
Marietta Middle teaches the International Baccalaureate Middle Years Program, according to its IB page. The district says it became the first IB World School district in Georgia authorized to offer the program, on April 23, 2008, according to its IB page.
Students who need a smaller setting can be referred by their counselor to the district’s non-traditional programs at the Woods-Wilkins Campus on Lemon Street, according to the campus page.
More on Marietta schools
- The school’s website and the district’s Our Schools page
- Every public school in Marietta
- Our Marietta schools guide for registration, school choice and board meetings
Frequently asked questions
What grades does Marietta Middle School serve?
Marietta Middle School serves grades 7 and 8. Sixth graders in Marietta City Schools attend the Marietta Sixth Grade Academy on Aviation Road.
What is Marietta Middle School’s CCRPI score?
Marietta Middle scored 78.6 on Georgia’s College and Career Ready Performance Index in the state’s 2025 School Grades report, compared with 80.8 in 2024 and 70.2 in 2023.
Which high school does Marietta Middle School feed into?
Marietta Middle students go on to Marietta High School, the district’s only high school, at 1171 Whitlock Ave. SW.
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