Julius Christensen (6 December 1840 – 19 October 1923) was a Norwegian doctor and politician for the Conservative Party.
He was born in Sandefjord as a son of ship-owner and merchant Søren Lorents Christensen (1810–1862) and Othilie Juliane Kruge (1820–1903). He was an older brother of military officer Sophus Christensen and whaler Christen Christensen, and through the latter an uncle of Lars Christensen.
He started his working career at sea, and had the shipmate examination. In 1862 he returned to land, finishing his secondary education in 1864. He enrolled at the Royal Frederick University whence he graduated with the cand.med. degree in 1871. He studied abroad for one year, mostly in Vienna. In September 1871 he married governess and later cookbook pioneer Dorothea von der Lippe Frost, settling in Sandefjord as a private doctor. He remained here for the rest of his career, and was also a doctor during the Jarlsberg Line construction (1878-1882) as well as savings bank director from 1880.
He was a member of Sandar municipal council from 1880 to 1884, then mayor of Sandefjord from 1894 to 1897. In the Norwegian parliamentary election, 1906 he was elected as a deputy representative to the Parliament of Norway from the constituency Larvik og Sandefjord. In the Norwegian local elections, 1907 he again became mayor of Sandefjord, this time serving until 1910. He was elected to another term as deputy representative to Parliament for the term 1913–1915.
He was the father of the doctor Reidar Gording and paternal grandfather of Elisabeth Gording. He died in October 1923.