Lieutenant General Casten Abraham Carl Warberg (2 December 1845 – 16 October 1910) was a Swedish Army officer.

Warberg was commissioned as an officer in 1864 in 2nd Life Guards (Andra livgardet) with the rank of underlöjtnant.

[1] Warberg attended the Royal Swedish Army Staff College in 1867 and was promoted to lieutenant the year after.

[1] Back in Sweden, Warberg served as chief of staff of the Life Guards Brigade (Livgardesbrigaden) from 1878 to 1881 and at the 4th Military District (4:e militärdistriktet) from 1881 to 1885.

[1] After having become captain in the 2nd Life Guards in 1879, Warberg advanced in 1884 to chief adjutant and major in the General Staff.

[1] He then served as vice chief in the Military Office of the Ministry of Land Defence from 1886 to 1888 when he was promoted to lieutenant colonel in the General Staff.