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

See the main article: County 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

Name	Portrait	Birth	Marriage(s)	Death
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

Name	Portrait	Birth	Marriage(s)	Death
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

See the main article: Grand Duchy of Oldenburg

Name	Portrait	Birth	Marriage(s)	Death
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

See the main article: Free State 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