Jens Jensen was an Australian politician. He represented the Division of Bass in the House of Representatives from 1910 to 1919. He was first elected as a member of the Australian Labor Party, and served as an Assistant Minister and then Minister for the Navy in the Fisher and Hughes governments.

When a group of more conservative ALP members under Billy Hughes broke away in 1917 over conscription issues to form the Nationalist Party of Australia, Jensen joined them. Hughes retained government after the split, and Jensen was appointed to the new ministry as Minister for the Navy and then later Minister for Trade and Customs.

In 1918, Jensen was investigated by the Royal Commission on Navy and Defence Administration. When the Commission found against him, he was forced to resign from the ministry. He retired at the 1919 elections, and was replaced by David Jackson, a fellow member of the Nationalist Party.