Cities and towns are marked in bold: Čavisov – Dolní Lhota – Horní Lhota – Klimkovice – Olbramice – Ostrava – Šenov – Stará Ves nad Ondřejnicí – Václavovice – Velká Polom – Vratimov – Vřesina – Zbyslavice The terrain is mostly flat and in the west slightly undulating, without significant hills.

The territory extends into four geomorphological mesoregions: Ostrava Basin (east and centre), Nízký Jeseník (west), Moravian Gate (southwest), and Opava Hilly Land (negligible part in the north).

The highest point of the district is the hill Úhorky in Horní Lhota with an elevation of 404 m (1,325 ft).

The lowest point of the district is the river bed of the Oder in Ostrava-Antošovice at 199 m (653 ft).

With only one exception, all the largest employers with headquarters in Ostrava-City District and at least 1,000 employees have their seat in Ostrava.