Sumner County Demographics

A map of Sumner County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	19,335	19,347	86.5%	86.4%
Hispanic	1,366	1,254	6.1%	5.6%
Multiracial	1,050	1,200	4.7%	5.4%
Native American/Other	271	308	1.2%	1.4%
Black	246	200	1.1%	0.9%
Asian	85	73	0.4%	0.3%

Sumner County, Kansas has an estimated population of 22,353, a less than 1% change from the 22,382 recorded in the 2020 Census. The population is 86.5% White, 6.1% Hispanic, 4.7% Multiracial, 1.2% Native American/Other, 1.1% Black, and 0.4% Asian. This demographic dot map shows the population of Sumner County, with one dot drawn for each person counted by the Census, color-coded by race.

Sumner is about as racially diverse as it was in the 2020 Census. It is considerably less diverse than Kansas overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Sumner County, that probability was 24.6% in 2020 and 24.6% in the most recent ACS estimates.

Sumner County is ranked the 25th most populous county in Kansas, out of 105 counties. Sumner County was ranked the 25th most populous county in the 2020 Census.

Sumner County's White Population

19,335 residents of Sumner County, or 86.5% of the population, identify as White. The share of White residents in Sumner County is considerably higher than in Kansas overall, where 72.7% of the population is White. Sumner County ranks 55th statewide in terms of White residents as a share of the population, out of 105 counties.

Since the 2020 Census, Sumner County's White population has remained roughly the same. White residents' share of Sumner County's population has remained roughly unchanged at 86.5%.

Sumner County is more White than neighboring Sedgwick County (64.9% White), Kay County (71.2% White), Grant County (85.2% White), Harper County (86.1% White), and Cowley County (76.9% White).

Sumner County's Black Population

246 residents of Sumner County, or 1.1% of the population, identify as Black. The share of Black residents in Sumner County is slightly lower than in Kansas overall, where 5.2% of the population is Black. Sumner County ranks 45th statewide in terms of Black residents as a share of the population, out of 105 counties.

Since the 2020 Census, Sumner County's Black population has grown by an estimated 23.0%. Black residents' share of Sumner County's population has remained roughly unchanged at 1.1%.

Sumner County is more Black than neighboring Harper County (0.8% Black). Sumner County is less Black than neighboring Sedgwick County (7.6% Black), Kay County (1.8% Black), Grant County (1.9% Black), and Cowley County (2.4% Black).

Sumner County's Asian Population

85 residents of Sumner County, or 0.4% of the population, identify as Asian. The share of Asian residents in Sumner County is slightly lower than in Kansas overall, where 2.9% of the population is Asian. Sumner County ranks 71st statewide in terms of Asian residents as a share of the population, out of 105 counties.

Since the 2020 Census, Sumner County's Asian population has grown by an estimated 16.4%. Asian residents' share of Sumner County's population has remained roughly unchanged at 0.4%.

Sumner County is more Asian than neighboring Grant County (0.1% Asian), and Harper County (0.3% Asian). Sumner County is less Asian than neighboring Sedgwick County (4.2% Asian), Kay County (0.5% Asian), and Cowley County (1.5% Asian).

Sumner County's Hispanic Population

1,366 residents of Sumner County, or 6.1% of the population, identify as Hispanic. The share of Hispanic residents in Sumner County is lower than in Kansas overall, where 13.6% of the population is Hispanic. Sumner County ranks 54th statewide in terms of Hispanic residents as a share of the population, out of 105 counties.

Since the 2020 Census, Sumner County's Hispanic population has grown by an estimated 8.9%. Hispanic residents' share of Sumner County's population has increased from 5.6% to 6.1%.

Sumner County is more Hispanic than neighboring Grant County (4.7% Hispanic). Sumner County is less Hispanic than neighboring Sedgwick County (16.5% Hispanic), Kay County (9% Hispanic), Harper County (8.1% Hispanic), and Cowley County (12.2% Hispanic).

Sumner County's Native American/Other Population

271 residents of Sumner County, or 1.2% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Sumner County is comparable to the share in Kansas overall, where 0.9% of the population is Native American/Other. Sumner County ranks 16th statewide in terms of Native American/Other residents as a share of the population, out of 105 counties.

Since the 2020 Census, Sumner County's Native American/Other population has declined by an estimated 12.0%. Native American/Other residents' share of Sumner County's population has remained roughly unchanged at 1.2%.

Sumner County is more Native American/Other than neighboring Sedgwick County (1% Native American/Other), and Harper County (0.6% Native American/Other). Sumner County is less Native American/Other than neighboring Kay County (7.8% Native American/Other), Grant County (2.6% Native American/Other), and Cowley County (1.7% Native American/Other).

Sumner County's Multiracial Population

1,050 residents of Sumner County, or 4.7% of the population, identify as Multiracial. The share of Multiracial residents in Sumner County is comparable to the share in Kansas overall, where 4.8% of the population is Multiracial. Sumner County ranks 18th statewide in terms of Multiracial residents as a share of the population, out of 105 counties.

Since the 2020 Census, Sumner County's Multiracial population has declined by an estimated 12.5%. Multiracial residents' share of Sumner County's population has decreased from 5.4% to 4.7%.

Sumner County is more Multiracial than neighboring Harper County (4.2% Multiracial). Sumner County is less Multiracial than neighboring Sedgwick County (5.8% Multiracial), Kay County (9.7% Multiracial), Grant County (5.5% Multiracial), and Cowley County (5.3% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.