St. Leo is an unincorporated community in southwestern Kingman County, Kansas, United States. It is six miles north of K-42. St. Leo features a Catholic church and has an active parish community. Its ZIP Code is 67112, and area code is 620.

The statistics of St. Leo are as follows: elevation is 1759 feet, latitude is 37° 31′ 45″N, longitude is 98° 24′ 37″W.

The community is served by Cunningham–West Kingman County USD 332 public school district.

• Kingman County maps: Current, Historic, KDOT

37°31′45″N 98°24′37″W / 37.52917°N 98.41028°W / 37.52917; -98.41028 (St. Leo)