Kelly is a census-designated place (CDP) in Nemaha County, Kansas, United States.

[2] Kelly got its start following construction of the Kansas City, Wichita and Northwestern Railway through that territory.

[3][4] A post office was opened in Kelly in 1888, and remained in operation until it was discontinued in 1988.

[5] The 2020 United States census counted 27 people, 13 households, and 13 families in Kelly.

[7] The community is served by Nemaha Central USD 115 public school district.