Harrisburg
Lincoln County6,736 in 2020·10,405 in 2025·+3,669 people
South Dakota rankings · Growth
Fastest-growing towns in South Dakota
Harrisburg has grown fastest of South Dakota’s 30 towns of 2,500+: up 54.5% from 6,736 residents in April 2020 to an estimated 10,405 in July 2025 (Census Bureau estimates). The typical town here changed +2.4%; 10 of the 30 lost residents.
Census Bureau population estimates, Vintage 2025: July 1, 2025 against the April 2020 base, both on January 2025 town lines (people a town annexed are in its base, not its growth). Estimates, not counts. Unincorporated communities (census-designated places) get no estimate, so they aren’t listed. A described list: no letters. How grades work
+54.5%
Tea
Lincoln County5,618 in 2020·8,019 in 2025·+2,401 people
#3Box Elder
Pennington County11,854 in 2020·13,936 in 2025·+2,082 people
All 30 towns
Growth since 2020, highest first.
30 towns ranked. Not here? See why a town may be missing.
#TownGrowth since 2020People addedResidents
Quick answers
Questions people ask
What is the fastest-growing town in South Dakota?
Harrisburg (Lincoln County): it grew 54.5%, from 6,736 residents in April 2020 to an estimated 10,405 in July 2025. Tea (+42.7%) and Box Elder (+17.6%) follow.
How are these towns ranked?
By the percent change in residents from the Census Bureau’s April 2020 estimates base to its latest July 1 estimate, highest first, on the exact change: two towns shown with the same tenth of a percent keep the order of their unrounded figures, and only an identical change shares a rank (T). The base is the 2020 Census count redrawn on today’s town lines, so a town that annexed land since 2020 changes only by births, deaths and moves, not by the people it took in. How grades work.
Why isn’t my town on this list?
The list covers the towns TownRatings grades that had 2,500+ residents in the 2020 estimates base (30 in South Dakota). Census-designated places (unincorporated communities) have no Census Bureau estimates, so they never appear; a town incorporated since 2020, or one TownRatings merges with its twin township, isn’t listed either. Every town is on the South Dakota page.
Go deeper
All South Dakota rankings →More South Dakota lists
Every list ranks the same 2,500+ towns, so a town’s rank means the same thing on each.
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