War of the Sixth Coalition Gustaf Jacob af Dalström was a Swedish military officer and civil servant.

Gustaf Jacob af Dalström was the son of the parish priest Erik Dahlström and his wife Christina Julin and married in 1816 to Anna Christina Hållander.

Dalström became an ensign in the Upplands Land Guard in 1808, he participated with distinction in the Finnish War and became a lieutenant after the Battle of Lemo on 19 August 1808.

In the War of the Sixth Coalition Dalström participated as chief of staff in the 4th Brigade and was severely wounded in the Combat of Roßlau.

In 1833 Dalström was knighted, and from 1821 to 1836, he served as a major at the Military Academy Karlberg and was a commander of the Älvsborg Regiment from 1836 to 1848.