Sumner County is located in south-central Kansas twenty-three miles south of Wichita and abutting the Oklahoma border. Sumner County is designated within the Wichita Metropolitan Statistical Area. The County encompasses 1,182 square miles and the population in 2015 was 23,638. The County seat is the City of Wellington with a population of approximately 8,000. The County is home to eleven incorporated communities, they are Argonia, Belle Plaine, Caldwell, Conway Springs, Gueda Springs, Hunnewell, Mayfield, Milan, Oxford, South Haven, and Wellington. A portion of the City of Mulvane also lies in Sumner County. There are also a number of smaller communities located within the county that are not incorporated.

Approximately 159 single family homes are currently available with an average selling cost of $170,000. Of the 159 homes on the market, 139 are selling for $150,000 or less, 9 in the $150,00-199,000 range, and 11 over $200,000. The median gross rent is $322.

Approximately 6,000 children are enrolled in the elementary and secondary education facilities with an average graduation rate of 98%. Sumner County is also served locally by several higher education institutions (both technical and degreed) with 12 others within 20-30 miles.

Recreational opportunities include area parks, golf courses, aquatic centers, hunting areas, and lakes and rivers for boating, camping and fishing. Sumner County is host to numerous local festivals.

Sumner County is home to two hospitals and benefits from approximately 14 physicians and 12 dentists.

There are more than 50 churches in Sumner County for all denominations.