Островский район
Ostrovsky District () is an administrative and municipal district (raion), one of the twenty-four in Kostroma Oblast, Russia. It is located in the southwest of the oblast. The area of the district is . Its administrative center is the rural locality (a settlement of rural type) of Ostrovskoye. Population: 14,758 (2002 Census); The population of Ostrovskoye accounts for 39.4% of the district's total population.