74 selected
- Not filled in
- Cambodia - Khmer Republic (1970-1975)
- Cambodia - Kingdom (1993-present)
- Cambodia - Kingdom (untill 1960)
- Cambodia - People's Republic of Cambodia (1979-1989)
- Cambodia - State of Camdodia (1989-1992)
- Cameroon - Republic (1960-present)
- Canada - British Controll (1755-1867)
- Canada - Confederation (1867-present)
- Cape Verde - Independent State (1975-present)
- Cape Verde - Portuguese Colony (1456-1975)
- Castile and Leon - Kingdom (1217-1474)
- Cayman Islands - British Colony (1972-present)
- Centraal-Afrikaanse republiek - keizerrijk (1976-1979)
- Central African Republic - First Republic (1960-1976)
- Central African States - Monetary Union CEMAC (1974-present)
- Central-Afrikan Republic - Republic (1979-present)
- Ceylon - British Colony (1796-1948)
- Ceylon - British Commonwealth (1948-1972)
- Ceylon - Monarchy (543 BC -1815)
- Ceylon - VOC-period (1640-1796)
- Chad - Republic (1960-present)
- Chile - Republic (1818-present)
- Chile - Spanish colony (1541-1818)
- China - Five Dynasties and 10 kingdoms (907-960)
- China - German Occupation (1898-1914)
- China - Jin Dynasty (1115-1234)
- China - Liao Dynasty (907-1125)
- China - Ming Dynasty (1368-1644)
- China - Northern and Southern Dynasties (420-581)
- China - Northern Song Dynasty (960-1127)
- China - People's Republic (1949-present)
- China - Qing Dynasty (1644-1912)
- China - Republic (1912-1949)
- China - South Ming Dynasty (1644-1662)
- China - Southern Song Dynasty (1127-1279)
- China - Sui Dynasty (581-618)
- China - Tang Dynastie (618-907)
- China - Three Kingdoms (220-280)
- China - Warring States (475 BC-221 BC)
- China - Western Han Dynasty (206 BC - 7 AD and 23-25)
- China - Western Xia Dynasty (1032-1227)
- China - Xin Dynasty (7-23)
- China - Yuan Dynasty (1271-1368)
- Colombia - Republic (1886-present)
- Colombia - Republiek of New Granada (1830-1863)
- Colombia - United States of Colombia (1863-1886)
- Colombia - Viceroyalty of New-Granada (1717-1819)
- Comoren - French colony (1912-1975)
- Comoros - Federal and Islamic Republic (1975-present)
- Comoros - French Protectorate (1886-1912)
- Congo Free State (1865-1908)
- Congo-Brazzaville - People's Republic (1970-present)
- Congo-Kinshasa - First Republic (1960-1965)
- Congo-Kinshasa - Third Republiek (1997-heden)
- Congo-Zaire - Second Republic (1965-1997)
- Cook Islands - Free association with New Zealand (1965-present)
- Costa Rica - Republic (1848-present)
- Costa-Rica - United Provinces of Central America (1823-1848)
- Crete - Greek Administration (1898-1913)
- Croatia - Republic (1991-present)
- crusaders
- Cuba - First Republic (1902-1940)
- Cuba - Revolutionary State (1976-heden)
- Cuba - Second Republic (1940-1976)
- Curaçao - Dutch Government (1816-1953)
- Cyprus - British occupation (1878-1925)
- Cyprus - Brittish crown Colony (1925-1960)
- Cyprus - Kingdom (1192-1489)
- Cyprus - Republic (1960-present)
- Czech Republic - Republic (1993-present)
- Czechoslovakia - Federal Republic CSFR (1990-1992(1993))
- Czechoslovakia - People's Republic (1953-1962)
- Czechoslovakia - Republic (1918-1953)
- Czechoslovakia - Socialist Republic (1962-1990)