Counts, dukes and grand dukes of Oldenburg

This is a list of the counts, dukes, grand dukes, and prime ministers of Oldenburg.

## Counts of Oldenburg 
* 1088/1101–1108 Elimar I
* 1108–1143 Elimar II
* 1143–1168 Christian I the Quarrelsome
* 1168–1211 Maurice I
* 1209–1251 Otto I, joint rule with Christian II and later with John I
* 1211–1233 Christian II
* 1233–1272 John I
* 1272–1278 Christian III
* 1272–1301 Otto II, Count of Oldenburg-Delmenhorst
* 1278–1305 John II
* 1302–1323 Christian IV
* 1305–1345 John III
* 1331–1356 John IV
* 1345–1368 Conrad I
* 1368–1386 Conrad II
* 1386–1420 Maurice II
* 1368–1398 Christian V
* 1398–1423 Christian VI
* 1423–1440 Dietrich the Lucky
* 1440–1448 Christian VII
* 1448–1483 Gerhard VI "the Quarrelsome"
* 1483–1500 Adolph, Count of Oldenburg-Delmenhorst
* 1500–1526 John V
* 1526–1529 John VI, joint rule with his brothers George, Christopher and Anthony I, forced to resign in 1529
* 1526–1529 George, joint rule with his brothers John VI, Christopher and Anthony I, forced to resign in 1529
* 1526–1566 Christopher, joint rule with his brothers John VI, George and Anthony I
* 1526–1573 Anthony I, joint rule with his brothers John VI, George and Christopher
* 1573–1603 John VII
* 1573–1619 Anthony II, Count of Oldenburg-Delmenhorst
* 1603–1667 Anthony Günther
* 1667–1670 Frederick I, in personal union as Frederick III King of Denmark-Norway
* 1670–1699 Christian VIII, in personal union as Christian V King of Denmark-Norway
* 1699–1730 Frederick II, in personal union as Frederick IV King of Denmark-Norway
* 1730–1746 Christian IX, in personal union as Christian VI King of Denmark-Norway
* 1746–1766 Frederick III, in personal union as Frederick V King of Denmark-Norway
* 1766–1773 Christian X, in personal union as Christian VII King of Denmark-Norway, ceded the county to the Holstein-Gottorp line
* 1773 Paul I, ceded the county to his cousin of the Holstein-Gottorp line
* 1773–1774 Frederick Augustus I (elevated to Duke in 1774), in personal union Prince-Bishop of Lübeck

## Dukes of Oldenburg 
| **Frederick Augustus I**1774–6 July 1785
|  
| 20 September 1711Gottorp, Schleswigson of Christian August of Holstein-Gottorp and Albertina Frederica
| Ulrike Friederike Wilhelmine of Hesse-KasselKassel21 November 1752 three children 
| 6 July 1785Oldenburgaged 73 
|-
| **William, Duke of Oldenburg**1785–1810
|  
|  3 January 1754Eutinson of Frederick August I and Ulrike 
| Never married
| 2 July 1823Schloss Plönaged 69 
|}

:*To France in 1810–1813*

| **William, Duke of Oldenburg**1813–2 July 1823 
|  
|  3 January 1754Eutinson of Frederick Augustus I and Ulrike 
| Never married
| 2 July 1823Schloss Plönaged 69 
|}

## Grand Dukes of Oldenburg
|**Peter I**1823–21 May 1829
|  
| 17 January 1755Rastedenephew of Frederick Augustus I and cousin of William
| Frederica of Württemberg 6 June 1781two children 
| 21 May 1829Oldenburgaged 74
|-
| **Augustus I**1829–27 February 1853
|  
| 13 July 1783Rastedeson of Peter I and Friederike 
| Adelheid of Anhalt-Bernburg-Schaumburg-Hoym24 July 1817two children Ida of Anhalt-Bernburg-Schaumburg-Hoym24 June 1825one childCecilia of Sweden  5 May 1831three children 
| 27 February 1853Oldenburgaged 69
|-
| **Peter II**1853–13 June 1900
|  
| 8 July 1827Oldenburgson of Augustus I and Ida
| Elisabeth of Saxe-Altenburg 10 February 1852two children 
| 13 June 1900Rastedeaged 72
|-
| **Frederick Augustus II**  1900–11 November 1918
|  
| 16 November 1852Oldenburgson of Peter II and Elisabeth 
| Elisabeth Anna of Prussia 18 February 1878two children Elisabeth of Mecklenburg-Schwerin 24 October 1896 5 children
| 24 February 1931Rastedeaged 78
|}

## Prime ministers of the Republic of Oldenburg
* 1918–1919 Bernhard Kuhnt (USPD)
* 1919–1923 Theodor Tantzen (DDP)
* 1923–1930 Eugen von Finckh (no party)
* 1930–1932 Friedrich Cassebohm
* 1932–1933 Carl Röver (NSDAP)
* 1933–1945 Georg Joel (NSDAP)
* 1945–1946 Theodor Tantzen (FDP)
:''To Lower Saxony in 1946

## References