K
- (Okhtyrskiy Rayon) Khvoshchova
- (Romenskyi Raion) Khutor Griniv
- (Okhtyrskiy Rayon) Khukhra
- (Shostkyns’ka Mis’krada) Kreshchikovo
- (Konotops’ka Mis’krada) Khreshchatik
- (Konotops’ka Mis’krada) Khovzivka
- (Shostkyns’ka Mis’krada) Khotmynivka
- (Sumskyi Raion) Khotin
- (Romenskyi Raion) Khoruzhivka
- (Romenskyi Raion) Khomyntsi
- (Shostkyns’ka Mis’krada) Khokhly
- (Shostkyns’ka Mis’krada) Khodyne
- (Romenskyi Raion) Khmeliv
- (Sumskyi Raion) Khmelivka
- (Okhtyrskiy Rayon) Khmelivets
- (Konotops’ka Mis’krada) Khyzhky
- (Shostkyns’ka Mis’krada) Khylchychi
- (Shostkyns’ka Mis’krada) Kharkivka
- (Sumskyi Raion) Kekyne
- (Konotops’ka Mis’krada) Kozatske
- (Konotops’ka Mis’krada) Kozache
- (Okhtyrskiy Rayon) Katanske
- (Konotops’ka Mis’krada) Karpilovka
- (Sumskyi Raion) Kardashovka
- (Okhtyrskiy Rayon) Kardashivka
- (Konotops’ka Mis’krada) Kardashi
- (Konotops’ka Mis’krada) Karabutove
- (Romenskyi Raion) Kapustyntsi
- (Shostkyns’ka Mis’krada) Kaplitsa
- (Sumskyi Raion) Kapitanivka