Sumner County, Kansas
Sumner County, Kansas, has 22,312 residents (July 2025 estimate). Its county seat is Wellington. It uses Central Time and covers 1,182 sq mi (3,061 km²) of land.
- Resident population, July 2025
- 22,312
- Land area
- 1,182 sq mi (3,061 km²)
- County seat or government
- Wellington
- Time zone
- Central TimeUTC-06:00 in January; UTC-05:00 in July
- Median household income
- $63,951 ± $4,642
- Median home value
- $135,100 ± $14,398
- Median rent, with utilities
- $825 ± $129
- Homes lived in by their owners
- 75.1% ± 3.2 points
- County type
- County
- Metro or micro area
- Wichita, KS metro areaOutlying county
- Water area
- 3.29 sq mi (8.51 km²)
- State
- Kansas
- County code (FIPS)
- 20191
- Coordinates (central point)
- 37.236662, -97.493352
These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.
Time zones in Sumner County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| Central TimeAmerica/Chicago | UTC-06:00 in January; UTC-05:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.
ZIP Code areas, largest first
- 671529,212 people
- 671108,722 people
- 670265,692 people
- 670132,678 people
- 670312,497 people
- 671461,867 people
- 670221,436 people
- 671191,287 people
- 67140971 people
- 67004801 people
- 67118769 people
- 67120575 people
18 ZIP Code areas overlap Sumner County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.
Official county information
We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
Townships in Sumner County, largest first
- Belle Plaine Township3,054 people
- Gore Township1,714 people
- Conway Township1,439 people
- Oxford Township1,200 people
- Springdale Township828 people
- Dixon Township714 people
- London Township572 people
- South Haven Township513 people
- Avon Township472 people
- Eden Township437 people
- Seventy-Six Township427 people
- Guelph Township350 people
All 30
- Walton Township318 people
- Falls Township200 people
- Caldwell Township156 people
- Palestine Township154 people
- Osborne Township151 people
- Wellington Township148 people
- Ryan Township120 people
- Downs Township117 people
- Greene Township107 people
- Sumner Township101 people
- Illinois Township98 people
- Harmon Township96 people
- Creek Township84 people
- Bluff Township57 people
- Chikaskia Township52 people
- Valverde Township36 people
- Jackson Township31 people
- Morris Township16 people
People counts are American Community Survey 2020–2024 5-year estimates. All townships in Kansas, by county
School districts in Sumner County, largest first
- Arkansas City Unified School District 47015,191 people
- Mulvane Unified School District 2639,616 people
- Wellington Unified School District 3538,757 people
- Clearwater Unified School District 2646,214 people
- Kingman-Norwich Unified School District 3315,575 people
- Conway Springs Unified School District 3562,914 people
- Belle Plaine Unified School District 3572,804 people
- Udall Unified School District 4631,996 people
- Oxford Unified School District 3581,743 people
- Caldwell Unified School District 3601,458 people
- South Haven Unified School District 5091,071 people
- Argonia Public Schools Unified School District 359988 people
Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.
Cities, towns and communities, largest first
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- Wellington, Kansas (city)7,615 people
- Mulvane, Kansas (city)6,171 people
- Conway Springs, Kansas (city)1,573 people
- Belle Plaine, Kansas (city)1,449 people
- Caldwell, Kansas (city)976 people
- Oxford, Kansas (city)964 people
- Argonia, Kansas (city)542 people
- South Haven, Kansas (city)276 people
- Geuda Springs, Kansas (city)223 people
- Milton, Kansas (CDP)185 people
- Hunnewell, Kansas (city)104 people
- Mayfield, Kansas (city)102 people
All 14
- Milan, Kansas (city)80 people
- Peck, Kansas (CDP)22 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Sedgwick County, Kansas31 mi north
- Harper County, Kansas32 mi west
- Kay County, Oklahoma35 mi southeast
- Grant County, Oklahoma35 mi southwest
- Cowley County, Kansas36 mi east
- Kingman County, Kansas42 mi northwest
- Butler County, Kansas52 mi northeast
Before using this answer on a form
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