Kalk (German: Köln-Kalk [ˈkœln ˈkalk], Kölsch: Kallek [ˈkalək] or [kalːk]) is the Eighth borough or Stadtbezirk of Cologne, Germany.

Kalk was merged into the city of Cologne in 1910, the borough was formed in 1975.

The borough of Kalk borders with Mülheim to the North, Rheinisch-Bergischer Kreis to the East, the Cologne borough of Porz to the South and Deutz to the West.

(ケルン日本語補習授業校 Kerun Nihongo Hoshū Jugyō Kō), a Japanese weekend school, holds its classes in the Kaiserin-Theophanu-Schule.

[3] Kalk is served by numerous railway stations and highways.