Östergötlands storregemente or Landsregementet i Östergötland (Östergötland Grand Regiment, Regiment of the Land in Östergötland) was one of the nine grand regiments organized by Gustavus Adolphus in the late 1610s and split into smaller regiments in the 1620s.
Raised in Götaland from smaller units of 500 men called fänikor, more specifically from the province of Östergötland and in the county of Jönköping, in 1618 and counting 3,000 men (at the time, it counted 2,176 men).
The regiment did not take part in any campaign during its short lifetime.
The grand regiments of Sweden where reorganized during the early 1620s to consist of three field regiments, each of eight companies of 150 men, thus making the total number 3,600 soldiers per grand regiment.
It is unsure whether or not the cavalry regiment was included in the total number.