1638 in Sweden

Incumbents

• Monarch – Christina

Events

• March 5 - Thirty Years' War - The Treaty of Hamburg is signed by France and Sweden.
• March 29 - Settlers from Sweden arrive on the ships Kalmar Nyckel and Fogel Grip to establish the settlement of New Sweden in Delaware, beginning the Swedish colonization of the Americas.
• September 6 – Posti Group is founded.

Births

• 21 January – Beata Rosenhane, feminist poet
• Lucidor, poet

Deaths

• David Drummond (soldier), Swedish general
• 26 April – Margareta Brahe, courtier