St. Marks is a census-designated place (CDP) in Sedgwick County, Kansas, United States.

[3] It is located about 4 miles (6 km) southwest of Colwich along "W 29th St N" between "N 183rd St W" and "N 199th St W", also it is located 5 miles (8 km) north of Goddard.

The community is based around the St. Mark Catholic Church that was built in c.1903-1906.

The first post office in Saint Marks was established February, 1879. the postal service was discontinued in December, 1903.

[4] The community is served by Renwick USD 267 public school district.