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 1711
Gottorp, Schleswig
son of Christian August of Holstein-Gottorp and Albertina Frederica
| Ulrike Friederike Wilhelmine of Hesse-Kassel
Kassel
21 November 1752
three children
| 6 July 1785
Oldenburg
aged 73
|-
| **William, Duke of Oldenburg**
1785–1810
|
|  3 January 1754
Eutin
son of Frederick August I and Ulrike
| Never married
| 2 July 1823
Schloss Plön
aged 69
|}

- _To France in 1810–1813_

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

## Grand Dukes of Oldenburg

|**Peter I**
1823–21 May 1829
|
| 17 January 1755
Rastede
nephew of Frederick Augustus I and cousin of William
| Frederica of Württemberg
 6 June 1781
two children
| 21 May 1829
Oldenburg
aged 74
|-
| **Augustus I**
1829–27 February 1853
|
| 13 July 1783
Rastede
son of Peter I and Friederike
| Adelheid of Anhalt-Bernburg-Schaumburg-Hoym
24 July 1817
two children

Ida of Anhalt-Bernburg-Schaumburg-Hoym
24 June 1825
one child

Cecilia of Sweden
  5 May 1831
three children
| 27 February 1853
Oldenburg
aged 69
|-
| **Peter II**
1853–13 June 1900
|
| 8 July 1827
Oldenburg
son of Augustus I and Ida
| Elisabeth of Saxe-Altenburg
 10 February 1852
two children
| 13 June 1900
Rastede
aged 72
|-
| **Frederick Augustus II**
1900–11 November 1918
|
| 16 November 1852
Oldenburg
son of Peter II and Elisabeth
| Elisabeth Anna of Prussia
 18 February 1878
two children

Elisabeth of Mecklenburg-Schwerin
 24 October 1896
5 children
| 24 February 1931
Rastede
aged 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