Garrison Mill Elementary School

Garrison Mill Elementary School is a mid-tier elementary school in Marietta, Georgia, one of the schools within Cobb County. The school caters to 649 students in grades pre-K through 5.

Cobb County comprises 110 schools with combined enrollment of 105,738 students; Garrison Mill Elementary School is among them.

For racial and ethnic makeup, Garrison Mill Elementary School logs that 69% of the student body identifies as White; the rest breaks down as 12% Asian, 9% Hispanic, 6% Black, 5% multiracial. By comparison, Cobb County as a whole is about 49% White, so the school skews visibly more White than its surroundings.

Looking at the economic backdrop, Staff filings list 46 full-time-equivalent teachers, which works out to roughly 14.1:1 students per teacher. The state averages around 13.3:1, so this campus is higher than the state norm typical. An estimated 12% of students are eligible for free or reduced-price lunch, a number frequently used as a low-income enrollment indicator. Set against Cobb County (around 53%), the school's rate is meaningfully below typical.

With demographic context factored in, Garrison Mill Elementary School tracks the demographic baseline. The model predicts 71.3% given the school's FRL share; actual proficiency is 69.1%.

Across the wider county, Cobb County reports that median household earnings sit near $102,738, 51% of adults hold a bachelor's degree or higher, and the poverty rate sits near 6%. In all, Cobb County runs 129 public schools (combined enrollment of about 116,609 students), of which Garrison Mill Elementary School is one.

Shallowford Falls Elementary School is the nearest neighboring public school, about 1.0 miles from this campus. Within five miles, there are 8 other public schools. Among the 9 schools in that immediate cluster with test data (this one included), Garrison Mill Elementary School ranks 7th on composite proficiency, below the local average of 75.0%.

The campus sits in a suburban setting.

Over the past 7-year window. Looking back 7 years, enrollment at Garrison Mill Elementary School has fell 6%, going from 687 students in 2018 to 649 in 2025. The Asian share of enrollment increased from 5% to 12% over that span. The student-to-teacher ratio fell from 15.1:1 in 2018 to 14.1:1 today.

On allk12, the page collects discussion, questions, and updates around fundraisers, lost-and-found posts, and report-card season. Posting is open to anyone connected to the school.