- Kalla, a stream in Northwest
- Kambagilsa, a stream in East
- Karlsa, a stream in East
- Kattarvik, a cove in East
- Keldua, a stream in East
- Kinn in East
- Kinnar, a slope in Northwest
- Kinnarland, a grazing area in East
- Kirkjubol in East
- Kirkjuholl in Northwest
- Kirkjutungur, a slope in East
- Kistufjall, a spur in Northeast
- Kistufjallalakur, a stream in East
- Kjalhraun, a hill in East
- Kjalki, a slope in Northwest
- Kjappeyri in East
- Kjartansstadir in Northwest
- Kjarvalsstadir in Northwest
- Kjolsvik in East
- Klausturhad, a hill in East
- Klaustursel in East
- Klausturselsheidi, a heath in East
- Kleif in Northwest
- Kleifarstekkur in East
- Kleppjarnsstadir in East
- Kleppur, a hill in East
- Klifshagi in Northeast
- Klifsheidi, a slope in Northeast
- Kliningskard, a pass in Northeast
- Klofasker, a hill in South
- Klofatindur, a peak in East
- Klofskardstindur, a peak in East
- Kluka in East
- Klukkutindur, a peak in East
- Knarareyri in Northeast
- Kofavik, a cove in Northeast
- Koislarskard, a pass in East
- Kolbeinsdalsa, a stream in Northwest
- Kolbeinsdalur, a valley in Northwest
- Kolbeinstangi, a peninsula in East
- Kolgrof in Northwest
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- Kolholstindur, a peak in East
- Kolkuos, a stream mouth in Northwest
- Kollaleira in East
- Kollavik, a bay in Northeast
- Kollavikursel in Northeast
- Kollavikurvatn, a lake in Northeast
- Kollfell, a hill in East
- Kollholl, a hill in Northeast
- Kollholsfloar, a bog in Northeast
- Kollseyra, a stream in East
- Kollsvik, a cove in Northeast
- Kollumuli, a headland in East
- Kolmuli in East
- Kolsstadagerdi in East
- Kolsstadir in East
- Koltungutindur, a peak in East
- Konguas, a ridge in Northeast
- Koreksstadir in East
- Korni, a rock in Northeast
- Kotagil, a gorge in Northwest
- Kotaheidi, a slope in Northwest
- Kotey in South
- Kotlubrunir, a ridge in Northeast
- Kotlugrunn, a bank in South
- Kotluhraun, a hill in East
- Kottjarnir, a lake in Northeast
- Krakavellir in Northwest
- Kraksstadir in Northwest
- Krossavik in East
- Krossavikursel in Northeast
- Krossdalur, a valley in East
- Krossfjall, a hill in East
- Krossgil, a gorge in East
- Krossos, a stream mouth in Northeast
- Krosssker, a rock in East
- Krosstindur, a peak in East
- Krossvatn, a lake in East
- Krossvatnshadir, a hill in East
- Krossvik, a cove in East
- Krubbar, a hill in Northeast
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