[4] It is located in the southern central part of the oblast.

The area of the district is 2,016.9 square kilometers (778.7 sq mi).

[1] Within the framework of administrative divisions, Arzamassky District is one of the forty in the oblast.

[1] The city of Arzamas serves as its administrative center,[1] despite being incorporated separately as a city of oblast significance—an administrative unit with the status equal to that of the districts.

[4] A narrow gauge railway serving the Peshelan gypsum mine is located in the village of Bebyayevo.