Nearly all the population growth across North Atlanta's nine largest cities since 2020 landed in three places, and Alpharetta and Milton were not among them.
Census Bureau estimates covering April 2020 through July 2025 show the region added roughly 11,000 residents, pushing the combined population from about 410,000 to 421,000. But Cumming, Sugar Hill and Suwanee accounted for all of that gain and then some, the North Atlanta Star reported on Sunday, Sept. 13. Losses in Johns Creek and Roswell dragged the regional total below what those three cities contributed.
Alpharetta added an estimated 1,111 residents over the five-year span, a 1.7% increase. Milton's population was essentially unchanged. Johns Creek lost an estimated 2,043 residents, the steepest drop among the nine cities, and Roswell lost about 1,329.
Where the growth went
Cumming led with an estimated 5,175 new residents, a 70.7% jump, though Census estimates account for annexations, so the increase does not reflect in-migration alone. Sugar Hill added 4,206 residents, a 16.8% increase that pushed its population above 29,000. Suwanee grew by about 2,252 to more than 23,000.
Forsyth County as a whole reached an estimated 282,805 residents in 2025, up 31,520 since 2020, a 12.5% increase. Most county residents live outside the incorporated city of Cumming. The Census Bureau released its Vintage 2025 estimates on Tuesday, Jan. 27. Georgia ranked fourth nationally in numeric growth, adding 98,540 residents from July 2024 to July 2025.
What stagnation means for Alpharetta and Milton
Flat population numbers do not mean construction has stopped; household sizes can shrink even as new units open. But the pattern carries consequences residents can measure.
Fulton County Schools enrolled 85,475 students during the 2025–26 school year, down 1,579 from the prior year, according to a North Atlanta Star analysis of enrollment trends. North Fulton regular district schools enrolled 43,229 students, down from more than 45,000 three years earlier.
Housing costs help explain the stagnation. The median owner-occupied home value is roughly $789,000 in Milton and $649,000 in Alpharetta, according to Census community estimates cited in that enrollment analysis.
In a Friday, Sept. 11, letter published by Appen Media, North Fulton residents Kathy Swahn, Nancy Diamond and Jack Murphy argued the region faces a workforce challenge tied to its housing supply. "We are in a talent battle with surrounding cities and counties," they wrote. "… The communities that offer housing options that meet the budgets of these essential workers will win."
Across six North Fulton cities, residents 65 and older now slightly outnumber adults ages 25 to 34, roughly 51,500 to 49,200, according to American Community Survey (ACS) data cited in the same letter.
The Census figures are annual estimates, not a new head count, and will be revised before the 2030 census. No public response from Alpharetta or Milton officials addressing the data's implications for city planning appears in the record as of publication.
