K
- (Okhtyrskiy Rayon) Komyshi
- (Sumskyi Raion) Kamiane
- (Shostkyns’ka Mis’krada) Kamianka
- (Okhtyrskiy Rayon) Kamianka
- (Okhtyrskiy Rayon) Kamianetske
- (Konotops’ka Mis’krada) Kamin
- (Sumskyi Raion) Kaliuzhne
- (Konotops’ka Mis’krada) Kalishi
- (Shostkyns’ka Mis’krada) Kalinovka
- (Shostkyns’ka Mis’krada) Kaliivka
- (Sumskyi Raion) Kalchenky
- (Shostkyns’ka Mis’krada) Kosynske
- (Shostkyns’ka Mis’krada) Karpechenkove
- (Shostkyns’ka Mis’krada) Khliborob
- (Konotops’ka Mis’krada) Kozlivka
- (Sumskyi Raion) Kandybyne
- (Sumskyi Raion) Kravchenkove
- (Sumskyi Raion) Khrapivshchyna
- (Romenskyi Raion) Kholodne
- (Romenskyi Raion) Komyshanka
- (Romenskyi Raion) Kushniry
- (Romenskyi Raion) Khorol
- (Romenskyi Raion) Kuplevakha
- (Romenskyi Raion) Karptsi
- (Romenskyi Raion) Kostiany
- (Romenskyi Raion) Koliadynets
- (Sumskyi Raion) Kobzarev
- (Sumskyi Raion) Kurasove
- (Konotops’ka Mis’krada) Kozinka
- (Sumskyi Raion) Kishchiki