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U.S. Census Bureau · 2025 Population Estimates Program (PEP)

Kansas County Population — 2025 PEP

July 1, 2025 resident population estimates for 105 counties. State total (sum of these county estimates): 2,977,220 persons.

Separate 2025 TIGER/Line county boundaries validate county identity; these are not ACS 2024 survey estimates.

Official Vintage 2025 county identities and unsimplified TIGER coordinates; separate-period ACS housing is joined only by exact full GEOID. Original 2020 counts require separately evidenced compatible geography; incompatible observations remain null with reasons. The revised April estimates base is not an original census count; no boundary allocation is invented.

Source and downloads

2025 Census PEP county estimates, 2020–2025 series; counts are persons, migration counts are persons, published rates are per 1,000, and unavailable values remain null (not zero). 2020 rates are unavailable for the partial-year interval. County totals and characteristics are verified against the pinned raw Census CSV receipts and independent 2025 county geometry.

Official Census PEP county source · Download JSON · Download CSV · Download source metadata

Official state totals and county summaries

Official NST July 1, 2025 state total: 2,977,220 persons (SUMLEV 040, PEP Vintage 2025). County sum: 2,977,220 persons; comparison status: equal.

Official NST July 2020: 2,938,274 persons; July 2020–July 2025 change: +38,946 persons; growth: 1.325472 percent (denominator: official July 2020 population).

County July 2024–July 2025: Growing: 40 · Shrinking: 63 · Unchanged: 2 · Missing: 0. Median county growth: -0.262743 percent.

Largest county: Johnson County (GEOID 20091): 636906 persons.

Fastest county growth: Geary County (GEOID 20061): 2.461582 percent.

Greatest numeric increase: Johnson County (GEOID 20091): 6074 persons.

no minimum population; missing excluded per measure; median of county percentages, not population weighted; equal values use ascending full GEOID.

Official state demographics

Resident population · SUMLEV 040 · July 1, 2025 · Census PEP Vintage 2025. Denominator for every share: 2,977,220 resident persons. Six exclusive race groups; Hispanic origin overlaps race and must not be added to it. Release: June 2026; exact day unproved; PEP estimates have no ACS sampling MOE.

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Official state age, sex, race and overlapping Hispanic origin
MeasureCountShare
Female1,495,752 persons50.239888 percent
Male1,481,468 persons49.760112 percent
Ages 18–24310,361 persons10.424524 percent
Ages 25–44757,881 persons25.455996 percent
Ages 45–64664,891 persons22.332612 percent
Ages 65 and older561,319 persons18.853796 percent
Under 18682,768 persons22.933072 percent
American Indian or Alaska Native alone46,069 persons1.547383 percent
Asian alone99,592 persons3.345134 percent
Black or African American alone182,485 persons6.129376 percent
Native Hawaiian or other Pacific Islander alone5,245 persons0.176171 percent
Two or more races165,391 persons5.555216 percent
White alone2,478,438 persons83.246720 percent
Hispanic (any race)434,206 persons14.584277 percent
Not Hispanic2,543,014 persons85.415723 percent

Official state median age: 38.1 years. Published state SYASEX median age; not a county aggregation, not ACS.

Download all state demographic observations (CSV)

Revised April 1, 2020 estimates base (official NST): 2,937,986 persons; county base sum: 2,937,986 persons; comparison: equal. This is not the original decennial census count.

Original April 1, 2020 Census count: 105 compatible counties; 0 unavailable. Published Census county centers-of-population POPULATION, original 2020 Gazetteer and official 2020–2025 geographic-change evidence; no boundary allocation. Original count, revised April estimates base and July 2020 estimate are separate observations. Documentation: November 2021; exact file release day unproved; retrieval is not release. Official original count source. Original 2020 Gazetteer identity plus Census geographic-change notes 2014–2025; no county-level change recorded from 2020 onward, exact full modern name, and original count required. Any recorded county-level change or referenced counterparty is conservatively unavailable, including unresolved internal redistricting. Same GEOID alone is insufficient. Not a claim of identical cartographic coordinates; no invented allocations.

Source release date unavailable: retained pins do not attest an official release date; retrieval is not release. Reference dates and Vintage 2025 are explicit; no current-vintage refresh is implied.

County population and demographic explorer

Choose a measure, observation year and county without downloading boundaries. Rankings, search, trends and CSV work without a map. Load map explicitly to download the full, unsimplified 2025 TIGER boundaries; this defers rather than removes their payload. The table remains available without JavaScript.

PEP population · persons · July 1, 2025. Denominator: none. Calculation/source: CO POPESTIMATEy. Vintage 2025; null with metric_status reason; measured zero remains zero; no imputation.

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After loading, Tab to a county and press Enter or Space; colors and the legend indicate signed direction and magnitude. Outlines show selection. The county picker works before and after map loading.

Selected county demographic breakdown

July 1, 2025 · Johnson County (GEOID 20091). Same-period county population is the share denominator. Hispanic origin overlaps race; do not add origin to race counts. Other overlapping classifications are not additive. Official county median age is from PEP AGESEX MEDIAN_AGE_TOT, not ACS.

County demographics: counts, shares and official median age
Classification / sourceCount or statisticShare / status
Sex · PEP male311,742 persons48.946312 percent
Sex · PEP female325,164 persons51.053688 percent
Age bands · PEP under18142,855 persons22.429526 percent
Age bands · PEP age18 2452,029 persons8.169023 percent
Age bands · PEP age25 44173,687 persons27.270429 percent
Age bands · PEP age45 64152,864 persons24.001030 percent
Age bands · PEP age65plus115,471 persons18.129991 percent
Race alone (partition) · PEP white alone530,679 persons83.321401 percent
Race alone (partition) · PEP black alone33,765 persons5.301410 percent
Race alone (partition) · PEP aian alone4,103 persons0.644208 percent
Race alone (partition) · PEP asian alone37,920 persons5.953783 percent
Race alone (partition) · PEP nhpi alone335 persons0.052598 percent
Race alone (partition) · PEP two or more30,104 persons4.726600 percent
Hispanic origin (overlaps race) · PEP hispanic any race63,929 persons10.037431 percent
Hispanic origin (overlaps race) · PEP not hispanic572,977 persons89.962569 percent
Other overlapping classifications (not additive) · PEP white alone or combination559,713 persons87.880001 percent
Other overlapping classifications (not additive) · PEP not hispanic white alone476,078 persons74.748550 percent
Official county median age · AGESEX MEDIAN_AGE_TOT39.5 yearsNot a share; not ACS or an average of county medians

Use Ctrl/Command or Shift to select multiple counties. The following trend uses exact resident persons, not percentages; county size affects the scale. Missing observations break lines; the revised April estimates base is a separate dashed partial interval.

2025 county population rankings

All 105 county estimates are present without JavaScript, ranked by 2025 population (largest first). Signed changes compare July 1, 2024 to July 1, 2025. Unavailable is not zero; equal values break ties by GEOID (ascending).

Showing all 105 counties; ranked by 2025 population, descending.

Kansas County Population — 2025 PEP — July 1, 2025; rank reflects the selected ordering
RankCountyGEOIDPopulation (persons)Signed change (persons)Signed change (percent)
1Johnson County20091636,906+6074 persons+0.962855%
2Sedgwick County20173538,433+4047 persons+0.757318%
3Shawnee County20177178,607+385 persons+0.216023%
4Wyandotte County20209170,597+727 persons+0.427974%
5Douglas County20045120,920-19 persons-0.015710%
6Leavenworth County2010384,590+246 persons+0.291663%
7Riley County2016172,598+526 persons+0.729826%
8Butler County2001569,484+358 persons+0.517895%
9Reno County2015561,539+169 persons+0.275379%
10Saline County2016953,377+63 persons+0.118168%
11Crawford County2003739,008+48 persons+0.123203%
12Finney County2005537,505-289 persons-0.764672%
13Geary County2006136,338+873 persons+2.461582%
14Miami County2012136,240+439 persons+1.226223%
15Cowley County2003534,382+131 persons+0.382471%
16Ford County2005733,993-294 persons-0.857468%
17Harvey County2007933,580-40 persons-0.118977%
18Lyon County2011132,266-85 persons-0.262743%
19Montgomery County2012530,177-229 persons-0.753141%
20McPherson County2011330,064-31 persons-0.103007%
21Ellis County2005129,075+49 persons+0.168814%
22Pottawatomie County2014927,186+328 persons+1.221238%
23Franklin County2005926,299+54 persons+0.205753%
24Barton County2000924,790-123 persons-0.493718%
25Sumner County2019122,312-60 persons-0.268192%
26Seward County2017521,073-64 persons-0.302787%
27Labette County2009919,685-9 persons-0.045699%
28Cherokee County2002119,105-62 persons-0.323473%
29Dickinson County2004118,637-1 persons-0.005365%
30Jefferson County2008718,296-11 persons-0.060086%
31Atchison County2000516,172+3 persons+0.018554%
32Osage County2013915,693-53 persons-0.336593%
33Neosho County2013315,637+6 persons+0.038385%
34Bourbon County2001114,319-121 persons-0.837950%
35Jackson County2008513,438+14 persons+0.104291%
36Allen County2000112,302-59 persons-0.477308%
37Marion County2011511,634-45 persons-0.385307%
38Nemaha County2013110,054-32 persons-0.317271%
39Linn County201079,950+86 persons+0.871857%
40Marshall County201179,852-58 persons-0.585267%
41Rice County201599,266-11 persons-0.118573%
42Pratt County201519,117+11 persons+0.120799%
43Brown County200139,104-29 persons-0.317530%
44Cloud County200298,833+103 persons+1.179840%
45Coffey County200318,467+138 persons+1.656862%
46Wilson County202058,299-2 persons-0.024093%
47Anderson County200038,018+85 persons+1.071474%
48Clay County200277,990-24 persons-0.299476%
49Thomas County201937,725-27 persons-0.348297%
50Doniphan County200437,5940 persons0.000000%
51Kingman County200957,029+4 persons+0.056940%
52Grant County200677,028-36 persons-0.509626%
53Wabaunsee County201977,018-61 persons-0.861704%
54Russell County201676,581-73 persons-1.097084%
55Ellsworth County200536,257-45 persons-0.714059%
56Pawnee County201455,991-60 persons-0.991572%
57Greenwood County200735,826-20 persons-0.342114%
58Sherman County201815,763-29 persons-0.500691%
59Ottawa County201435,744-64 persons-1.101928%
60Gray County200695,652-38 persons-0.667838%
61Mitchell County201235,590-150 persons-2.613240%
62Washington County202015,533-28 persons-0.503507%
63Harper County200775,370-37 persons-0.684298%
64Morris County201275,348+41 persons+0.772565%
65Norton County201375,288-17 persons-0.320452%
66Stevens County201894,984-63 persons-1.248266%
67Scott County201714,815-93 persons-1.894866%
68Phillips County201474,728-23 persons-0.484109%
69Rooks County201634,646-71 persons-1.505194%
70Republic County201574,640+15 persons+0.324324%
71Barber County200074,083-2 persons-0.048960%
72Stafford County201854,005+86 persons+2.194437%
73Kearny County200933,888+19 persons+0.491083%
74Meade County201193,852-40 persons-1.027749%
75Haskell County200813,599+41 persons+1.152333%
76Smith County201833,566-24 persons-0.668524%
77Chautauqua County200193,321-52 persons-1.541654%
78Osborne County201413,285-56 persons-1.676145%
79Woodson County202073,118+2 persons+0.064185%
80Lincoln County201052,861-37 persons-1.276743%
81Rush County201652,845+14 persons+0.494525%
82Jewell County200892,830-34 persons-1.187151%
83Trego County201952,740+4 persons+0.146199%
84Decatur County200392,716+3 persons+0.110579%
85Logan County201092,661-26 persons-0.967622%
86Edwards County200472,640-81 persons-2.976847%
87Gove County200632,631-38 persons-1.423754%
88Ness County201352,617-12 persons-0.456447%
89Cheyenne County200232,604-14 persons-0.534759%
90Chase County200172,572-21 persons-0.809873%
91Hamilton County200752,500-9 persons-0.358709%
92Morton County201292,470-28 persons-1.120897%
93Elk County200492,458+8 persons+0.326531%
94Kiowa County200972,432+16 persons+0.662252%
95Rawlins County201532,431+6 persons+0.247423%
96Sheridan County201792,427-6 persons-0.246609%
97Graham County200652,371+20 persons+0.850702%
98Wichita County202032,031-8 persons-0.392349%
99Stanton County201871,986-23 persons-1.144848%
100Clark County200251,900+10 persons+0.529101%
101Comanche County200331,6730 persons0.000000%
102Hodgeman County200831,619-46 persons-2.762763%
103Lane County201011,508+7 persons+0.466356%
104Wallace County201991,441-39 persons-2.635135%
105Greeley County200711,182-9 persons-0.755668%

County population trend · 2020–2025

Resident population (persons), not ACS housing. April 1, 2020 estimates base is distinct from the July 1, 2020 estimate. The April–July 2020 change is partial-year; the July 2020–July 2021 interval is the first July-to-July comparison. No 2020 annual rate is shown. Missing observations are unavailable, never zero.

Showing Johnson County (GEOID 20091). Select a county on the map or in the rankings table to update this trend.

Horizontal axis: year (2020–2025); vertical axis: resident population (persons). The 2020 base is a separate April 1 observation; July 1 estimates run from 2020 through 2025. Focus the chart viewport and use Left/Right arrows to scroll on narrow screens. Complete axis labels stay here outside the scrolling chart; the table gives exact values and availability.

Population observations for Johnson County (GEOID 20091), persons
DatePopulation (persons)Interval
April 1, 2020 base609,865Estimates base; not July 1
July 1, 2020611,129April–July partial-year; no annual rate
July 1, 2021615,067July 2020–July 2021 comparison
July 1, 2022619,693July-to-July estimate
July 1, 2023625,261July-to-July estimate
July 1, 2024630,832July-to-July estimate
July 1, 2025636,906July-to-July estimate

County population and median home value · different vintages

Each point pairs a county’s PEP July 1, 2025 resident population (persons) with its ACS 2024 5-year median owner-occupied home value (B25077, U.S. dollars). These are different reference periods and different statistical programs. This descriptive comparison does not imply causality or matched vintages. Suppressed, missing or invalid ACS estimates are unavailable, not zero and not plotted. A valid zero remains zero.

The exact-value table below works without JavaScript; chart loading requires JavaScript.

Select a county using the map or rankings to coordinate the comparison.

County comparison: PEP July 1, 2025 population (persons) and ACS 2024 5-year median owner-occupied home value (U.S. dollars); unavailable values identified
CountyGEOIDPEP July 1, 2025 population (persons)ACS 2024 5-year median home value (U.S. dollars)
Allen County2000112,302$107,600
Anderson County200038,018$171,400
Atchison County2000516,172$145,700
Barber County200074,083$97,000
Barton County2000924,790$126,400
Bourbon County2001114,319$113,800
Brown County200139,104$118,100
Butler County2001569,484$217,600
Chase County200172,572$109,700
Chautauqua County200193,321$65,500
Cherokee County2002119,105$100,100
Cheyenne County200232,604$125,900
Clark County200251,900$87,600
Clay County200277,990$155,900
Cloud County200298,833$100,000
Coffey County200318,467$157,400
Comanche County200331,673$69,600
Cowley County2003534,382$120,900
Crawford County2003739,008$132,600
Decatur County200392,716$89,500
Dickinson County2004118,637$146,800
Doniphan County200437,594$135,200
Douglas County20045120,920$309,400
Edwards County200472,640$70,900
Elk County200492,458$68,500
Ellis County2005129,075$216,300
Ellsworth County200536,257$114,900
Finney County2005537,505$201,400
Ford County2005733,993$151,100
Franklin County2005926,299$198,700
Geary County2006136,338$172,700
Gove County200632,631$118,400
Graham County200652,371$89,900
Grant County200677,028$110,300
Gray County200695,652$206,000
Greeley County200711,182$115,200
Greenwood County200735,826$88,700
Hamilton County200752,500$115,800
Harper County200775,370$83,800
Harvey County2007933,580$180,300
Haskell County200813,599$165,100
Hodgeman County200831,619$101,600
Jackson County2008513,438$207,300
Jefferson County2008718,296$216,900
Jewell County200892,830$64,600
Johnson County20091636,906$391,200
Kearny County200933,888$200,900
Kingman County200957,029$111,100
Kiowa County200972,432$155,300
Labette County2009919,685$94,600
Lane County201011,508$127,100
Leavenworth County2010384,590$282,900
Lincoln County201052,861$96,900
Linn County201079,950$173,600
Logan County201092,661$117,900
Lyon County2011132,266$150,600
McPherson County2011330,064$211,200
Marion County2011511,634$124,200
Marshall County201179,852$127,700
Meade County201193,852$148,900
Miami County2012136,240$287,700
Mitchell County201235,590$133,800
Montgomery County2012530,177$101,700
Morris County201275,348$129,600
Morton County201292,470$96,100
Nemaha County2013110,054$217,200
Neosho County2013315,637$111,300
Ness County201352,617$89,700
Norton County201375,288$101,500
Osage County2013915,693$156,800
Osborne County201413,285$86,400
Ottawa County201435,744$166,000
Pawnee County201455,991$93,000
Phillips County201474,728$96,500
Pottawatomie County2014927,186$245,900
Pratt County201519,117$114,600
Rawlins County201532,431$103,800
Reno County2015561,539$132,500
Republic County201574,640$75,600
Rice County201599,266$104,600
Riley County2016172,598$237,100
Rooks County201634,646$89,000
Rush County201652,845$83,600
Russell County201676,581$119,000
Saline County2016953,377$179,600
Scott County201714,815$160,000
Sedgwick County20173538,433$203,300
Seward County2017521,073$136,500
Shawnee County20177178,607$180,900
Sheridan County201792,427$167,200
Sherman County201815,763$136,700
Smith County201833,566$94,100
Stafford County201854,005$97,600
Stanton County201871,986$67,800
Stevens County201894,984$129,300
Sumner County2019122,312$135,100
Thomas County201937,725$172,700
Trego County201952,740$120,900
Wabaunsee County201977,018$177,300
Wallace County201991,441$105,000
Washington County202015,533$117,100
Wichita County202032,031$99,300
Wilson County202058,299$93,500
Woodson County202073,118$81,200
Wyandotte County20209170,597$172,300