The administrative center of the district is Zelenodolsk. Area – 1406,0 square km. The district was founded in 1938. The city of Zelenodolsk is situated in the northwest of the republic, on the left bank of the river Volga, 38 km from Kazan. Zelenodolsk is a big railway junction. Since 1932 Zelenodolsk is a city.