Carl Theodor Severin (13 September 1763, Mengeringhausen – 20 February 1836, Bad Doberan, Germany) was a German architect.
Severin was to assist his predecessor Johann Christoph Heinrich von Seydewitz [de] until his retirement in 1796.
Since Seydewitz stayed in the office for a longer period than expected, Severin first became an unpaid chamber engineer in 1795 at the Schweriner Kammerkollegium, and in November 1795 he was given the position of "bauconducteur to the local court and town buildings".
In 1803, Severin built a male bath and an annex to the bathhouse in Heiligendamm, the rotunda in 1804 and the viewing tower in 1807.
Severin traded his residence which was situated south of the Kamp for a plot of land on the same road and erected a representative building there in 1823–1824.
Thanks to him Bad Doberan is one of the few places in Germany today with a uniform classic architectural style.