- Ardatovsky District
- Atyashevsky District
- Atyuryevsky District
- Bolshebereznikovsky District
- Bolsheignatovsky District
- Chamzinsky District
- Dubyonsky District
- Ichalkovsky District
- Insarsky District
- Kadoshkinsky District
- Kochkurovsky District
- Kovylkino
- Kovylkinsky District
- Krasnoslobodsky District
- Lyambirsky District
- Romodanovsky District
- Ruzayevka
- Ruzayevsky District
- Saransk
- Staroshaygovsky District
- Temnikovsky District
- Tengushevsky District
- Torbeyevsky District
- Yelnikovsky District
- Zubovo-Polyansky District