Rasmus Krag (1763–1838) was a military officer and engineer in the service of Denmark-Norway and, after the Treaty of Kiel, just Denmark.

[1][2] In 1784 he was commissioned as a junior lieutenant in the engineer corps and involved with defence works and other building in Norway–partly in Christiansand, partly at Frederiksværn and Laurvig.

[2] On the outbreak of hostilities with Britain in the spring of 1801, Rasmus Krag was appointed as adjutant to the commander of the island of Funen,[1] a position which he held with several breaks until 1808.

He was further promoted in 1807 as a major in the Infantry and early in 1808 as a lieutenant-colonel on the newly formed general quartermaster staff.

Struck by a sudden illness on 3 January 1838, he collapsed near the Frederiksholms Canal in Copenhagen just as the future King Christian IX was passing.