K
- (Romenskyi Raion) Kliusy
- (Shostkyns’ka Mis’krada) Kamenskoye
- (Shostkyns’ka Mis’krada) Kurgan
- (Konotops’ka Mis’krada) Kurylivka
- (Shostkyns’ka Mis’krada) Katerynivka
- (Sumskyi Raion) Katerynivka
- (Sumskyi Raion) Katerynivka
- (Okhtyrskiy Rayon) Katerynivka
- (Konotops’ka Mis’krada) Kuzky
- (Okhtyrskiy Rayon) Kuzemyn
- (Romenskyi Raion) Kurmany
- (Sumskyi Raion) Kurylivka
- (Sumskyi Raion) Kurhan
- (Shostkyns’ka Mis’krada) Korenok
- (Shostkyns’ka Mis’krada) Kurdiumivka
- (Sumskyi Raion) Kulychka
- (Sumskyi Raion) Kudanivka
- (Shostkyns’ka Mis’krada) Kucherivka
- (Konotops’ka Mis’krada) Kruzhok
- (Shostkyns’ka Mis’krada) Krupets
- (Sumskyi Raion) Krovne
- (Sumskyi Raion) Kryzhyk
- (Shostkyns’ka Mis’krada) Kryvonosivka
- (Konotops’ka Mis’krada) Krivonosovka
- (Sumskyi Raion) Krinichnoye
- (Okhtyrskiy Rayon) Krynychne
- (Romenskyi Raion) Krevsuny
- (Shostkyns’ka Mis’krada) Krenydivka
- (Konotops’ka Mis’krada) Krasne
- (Shostkyns’ka Mis’krada) Krasychka