Dietrich, Count of Oldenburg

Dietrich of Oldenburg
Count of Oldenburg
PredecessorChristian V of Oldenburg
SuccessorChristian VII
Bornc. 1398
Died14 February 1440 (aged 41–42)
Delmenhorst,Germany
BuriedRoskilde Cathedral, Roskilde, Denmark
Noble familyHouse of Oldenburg
Spouse(s)Countess Adelheid of Oldenburg-Delmenhorst
Hedvig of Holstein
IssueChristian I of Denmark
Maurice V of Delmenhorst
Gerhard VI, Count of Oldenburg
Adelheid, Countess of Hohenstein and Mansfeld
FatherChristian V, Count of Oldenburg
MotherCountess Agnes of Honstein

Dietrich or Theoderic of Oldenburg (c. 1398 – 14 February 1440) was a feudal lord in Northern Germany, holding the counties of Delmenhorst and Oldenburg. He was called "Fortunatus", as he was able to secure Delmenhorst for his branch of the Oldenburgs.

Dietrich was the father of Christian I of Denmark, who would go on to start the current dynasty of the Danish throne.