K
- Kabbala
- Kafiristan and Kashmir
- Kafirs
- Kaiserchronik
- Kaiserwilhelmsland
- Kajetan Georg von Kaiser
- Kalands Brethren
- Kalispel Indians
- Kalocsa-Bacs
- Kamerun (Cameroon)
- Kandy
- Kansas
- Kansas City
- Kantes Mariales
- Karinthia
- Karl August Lossen
- Karl Ernst Jarcke
- Karl Ernst, Freiherr von Moy de Sons
- Karl Friedrich Rumohr
- Karl Friedrich Savigny
- Karl Johann Greith
- Karl Josef Rudolph Cornely
- Karl Joseph Hieronymus Windischmann
- Karl Joseph von Hefele
- Karl Kreil
- Karl Ludwig von Haller
- Karl Lueger
- Karl Maria Friedrich Ernst von Weber
- Karl Muller
- Karl Proske
- Karl von Haimhausen
- Karl von Holtei
- Karl von Miltiz
- Karl Zell
- Kaskaskia Indians
- Kaspar Ulenberg
- Kasper Franck
- Kathleen O'Meara
- Kearney
- Kenelm Henry Digby
- Kenosis
- Kenraghty
- Kentucky
- Kerkuk
- Kerry and Aghadoe
- Kharput
- Kiang-Nan
- Kickapoo Indians
- Kielce
- Kildare and Leighlin
- Killala
- Killaloe
- Kilmore
- Kimberley
- Kimberley in Orange
- King Canute
- King David
- Kingdom of God
- Kingisel
- Kingston
- Kinloss
- Kiowa Indians
- Kirkwall
- Kisfaludy
- Kiss
- Klemens Maria Brentano
- Klinkowstrom
- Kneeling and Genuflection
- Knights of Columbus
- Knights of Malta
- Knights of the Cross
- Knights of the Holy Sepulchre
- Knights of the Redeemer
- Knowledge
- Knowledge of Jesus Christ
- Knownothingism
- Koniggratz
- Konrad (Der Pfaffe)
- Konrad Martin
- Konrad of Lichtenau
- Konrad of Megenberg
- Konrad of Wurzburg
- Konrad Sweynheim
- Konrad Wimpina
- Konstantin von Hoefler
- Koran
- Krain
- Kremsmunster
- Kulturkampf
- Kumbakonam
- Kutenai Indians
- Kwang-Tung
- Kwangi-Si
- Kwango
- Kwei-Chou
- Kyrie Eleison
- St. Kevin (Coemgen)
- St. Kilian
- The Kingdom of Bavaria
- The Knights Templar