K
- (Sumskyi Raion) Krinichki
- (Sumskyi Raion) Kulyky
- (Shostkyns’ka Mis’krada) Krasnaya Polyana
- (Okhtyrskiy Rayon) Karpylivka
- (Sumskyi Raion) Krinichnyy
- (Sumskyi Raion) Kononenkove
- (Sumskyi Raion) Kardashivka
- (Sumskyi Raion) Klinki
- (Sumskyi Raion) Khvoine
- (Sumskyi Raion) Khylkove
- (Sumskyi Raion) Kruglik
- (Okhtyrskiy Rayon) Kholodovo
- (Sumskyi Raion) Kerdylivshchyna
- (Sumskyi Raion) Karavan
- (Okhtyrskiy Rayon) Khomenki
- (Okhtyrskiy Rayon) Kvashino
- (Sumskyi Raion) Kokhanyy
- (Okhtyrskiy Rayon) Kostevka
- (Okhtyrskiy Rayon) Kobylevka
- (Okhtyrskiy Rayon) Kudriave
- (Okhtyrskiy Rayon) Klymentove
- (Okhtyrskiy Rayon) Kudari
- (Okhtyrskiy Rayon) Kachanivka
- (Sumskyi Raion) Korchany
- (Shostkyns’ka Mis’krada) Kamenka
- (Shostkyns’ka Mis’krada) Khodunia
- (Shostkyns’ka Mis’krada) Krekotnova
- (Shostkyns’ka Mis’krada) Krasnoiarske
- (Shostkyns’ka Mis’krada) Kalinovets
- (Shostkyns’ka Mis’krada) Kustyne