- Kostroma ( 277,656 )
- Shar'ya ( 29,800 )
- Buy ( 26,486 )
- Nerekhta, Kostroma Oblast ( 25,352 )
- Manturovo ( 18,817 )
- Galich ( 18,594 )
- Volgorechensk ( 17,700 )
- Vetluzhskiy, Kostroma ( 13,229 )
- Neya ( 11,144 )
- Krasnoye-na-Volge ( 7,953 )
- Makar'yev ( 7,600 )
- Soligalich ( 6,886 )
- Chukhloma ( 5,430 )
- Sudislavl' ( 5,236 )
- Ostrovskoye, Kostroma Oblast ( 5,138 )
- Chistyye Bory ( 5,103 )
- Vokhma ( 4,663 )
- Ponazyrevo ( 4,568 )
- Susanino ( 3,961 )
- Kadyy ( 3,783 )
- Antropovo ( 3,736 )
- Kologriv ( 3,605 )
- Pyshchug ( 3,226 )
- Parfen'yevo ( 3,200 )
- Pavino ( 2,947 )
- Georgiyevskoye, Kostroma Oblast ( 2,800 )
