 He was elected to the Norwegian Parliament in 1842 and 1845, He was then elected three more times, in 1854, 1857 and 1859, from the constituency "Lillehammer og Hamar" where he worked as a school principal .Lange sat as mayor in Lillehammer in 1853, 1855 and 1861 to 1863.He was also director of Lillehammer sparebank from 1855 to 1861.