Second Republic
- Constitution of Niger
- Fifth Republic (disambiguation)
- First Republic (disambiguation)
- Fourth Republic (disambiguation)
- French Second Republic
- Portuguese Second Republic
- Second Armenian Republic
- Second Austrian Republic
- Second Brazilian Republic
- Second Cambodian Republic
- Second Costa Rican Republic
- Second Czechoslovak Republic
- Second Dominican Republic
- Second East Turkestan Republic
- Second Hellenic Republic
- Second Hungarian Republic
- Second Italian Republic
- Second Mexican Republic
- Second Nigerian Republic
- Second Philippine Republic
- Second Polish Republic
- Second Republic (campaign group)
- Second Republic of Ghana
- Second Republic of Korea
- Second Republic of Kosovo
- Second Republic of Madagascar
- Second Republic of Sierra Leone
- Second Republic of Uganda
- Second Republic of Venezuela
- Second Republic of Vietnam
- Second Republic of the Maldives
- Second Roman Republic
- Second Slovak Republic
- Second Spanish Republic
- Second Syrian Republic
- Seventh Republic
- Sixth Republic (disambiguation)
- Third Republic (disambiguation)