County facts · Population growth · October 24, 2026
Fastest Growing Counties in Kansas, 2020 to 2025
Kansas's fastest growing counties by percent and by people added, April 2020 to July 2025 Census estimates, with each official parcel map.
Looking for the fastest growing counties in Kansas? From the Census Bureau's April 1, 2020 estimates base to its July 1, 2025 estimate, Kansas went from about 2,937,986 to 2,977,220 residents, a change of +39,234 (+1.3%). The fastest growing county by percentage was Pottawatomie County (+7.2%), while Johnson County added the most people (+27,041, +4.4%).
Each table links the county's Platbookmapper page and its official parcel viewer, so you can go from the growth numbers straight to the property lines.
Kansas growth at a glance
- Counties: 105
- Statewide, April 2020 to July 2025: +39,234 residents (+1.3%); July 2024 to July 2025 alone: +11,968 (+0.4%)
- Grew: 21 of 105 · Lost residents: 83 · No change: 1
- Fastest growing by percent: Pottawatomie County (+7.2%); most people added: Johnson County (+27,041)
- Counties with more deaths than births over the period: 78 of 105
The 10 fastest growing Kansas counties by percent
| # | County | Apr 2020 | Jul 2025 | Change | % change | Parcel viewer |
|---|---|---|---|---|---|---|
| 1 | Pottawatomie County | 25,353 | 27,186 | +1,833 | +7.2% | ArcGIS Web AppBuilder |
| 2 | Miami County | 34,191 | 36,240 | +2,049 | +6.0% | Beacon (Schneider Geospatial) |
| 3 | Johnson County | 609,865 | 636,906 | +27,041 | +4.4% | county web map |
| 4 | Linn County | 9,600 | 9,950 | +350 | +3.6% | county web map |
| 5 | Leavenworth County | 81,909 | 84,590 | +2,681 | +3.3% | ORKA (Kansas) |
| 6 | Butler County | 67,371 | 69,484 | +2,113 | +3.1% | ArcGIS Web AppBuilder |
| 7 | Sedgwick County | 523,844 | 538,433 | +14,589 | +2.8% | county web map |
| 8 | Anderson County | 7,836 | 8,018 | +182 | +2.3% | ORKA (Kansas) |
| 9 | Wabaunsee County | 6,880 | 7,018 | +138 | +2.0% | ORKA (Kansas) |
| 10 | Douglas County | 118,785 | 120,920 | +2,135 | +1.8% | ArcGIS Experience Builder |
These 10 added about 53,111 people combined. The median county changed by −1.7%.
The 10 counties that added the most people
| # | County | People added | % change | Jul 2025 | Parcel viewer |
|---|---|---|---|---|---|
| 1 | Johnson County | +27,041 | +4.4% | 636,906 | county web map |
| 2 | Sedgwick County | +14,589 | +2.8% | 538,433 | county web map |
| 3 | Leavenworth County | +2,681 | +3.3% | 84,590 | ORKA (Kansas) |
| 4 | Douglas County | +2,135 | +1.8% | 120,920 | ArcGIS Experience Builder |
| 5 | Butler County | +2,113 | +3.1% | 69,484 | ArcGIS Web AppBuilder |
| 6 | Miami County | +2,049 | +6.0% | 36,240 | Beacon (Schneider Geospatial) |
| 7 | Pottawatomie County | +1,833 | +7.2% | 27,186 | ArcGIS Web AppBuilder |
| 8 | Wyandotte County | +1,362 | +0.8% | 170,597 | ORKA (Kansas) |
| 9 | Riley County | +636 | +0.9% | 72,598 | ORKA (Kansas) |
| 10 | Linn County | +350 | +3.6% | 9,950 | county web map |
The top 10 account for about 97% of all the gains in the counties that grew.
Where the new residents came from
The Census Bureau splits each change into natural change (births minus deaths), net domestic migration (moves from other parts of the US) and net international migration. Totals for April 2020 to July 2025 in the five fastest growing counties:
| County | Births minus deaths | Net domestic moves | Net international moves | Total change |
|---|---|---|---|---|
| Pottawatomie County | +917 | +711 | +199 | +1,833 |
| Miami County | +74 | +1,953 | +21 | +2,049 |
| Johnson County | +11,208 | +2,361 | +13,056 | +27,041 |
| Linn County | −227 | +583 | +3 | +350 |
| Leavenworth County | +697 | +1,384 | +547 | +2,681 |
In 3 of these 5, moves from elsewhere in the US were the biggest source of growth. The three parts do not add up exactly to the total because the Census Bureau also carries a small residual.
The last year alone: July 2024 to July 2025
- Geary County: +2.5% (+873)
- Stafford County: +2.2% (+86)
- Coffey County: +1.7% (+138)
- Miami County: +1.2% (+439)
- Pottawatomie County: +1.2% (+328)
2 of these 5 are also in the 2020–2025 top 10.
Counties losing residents
83 of Kansas's 105 counties had fewer residents in July 2025 than in April 2020. The steepest declines:
- Edwards County: −9.2% (−267, now about 2,640)
- Morton County: −8.4% (−227, now about 2,470)
- Greeley County: −7.9% (−102, now about 1,182)
- Scott County: −6.6% (−339, now about 4,815)
- Hodgeman County: −6.1% (−106, now about 1,619)
What fast growth means on a parcel map
- New lots show up as plats first. When land is subdivided, the plat is recorded with the county and the parcel layer catches up on its own schedule, so a brand-new lot may not appear on the map for a while. Check the recorder's recent plats if a parcel looks missing.
- Parcel numbers change after splits. A tract that was one parcel last year can be several today. Search by owner name or address as well as by an old parcel number.
- City limits move. Growing cities annex land, which changes who handles zoning and permits even though the county still keeps the deed and the tax map.
- Percent is not the same as people. A small county can post a big percentage on a modest number of new residents, so read the people-added column too.
Related guides
- Largest counties in Kansas
- Kansas county GIS websites by viewer
- Kansas landowner maps for hunting
- Fastest growing counties in the US
- US counties losing population
More: All Kansas counties on Platbookmapper
Sources
- U.S. Census Bureau, Population Estimates Program, county totals, Vintage 2025 (April 1, 2020 estimates base and July 1, 2020–2025 estimates, with components of change). Percent change is from the April 1, 2020 estimates base to the July 1, 2025 estimate.
- Platbookmapper county GIS directory (live data file behind our county pages, pulled October 24, 2026) for each official parcel viewer.