Ole Hannibal Sommerfelt (3 March 1753 – 6 April 1821) was a Norwegian jurist, civil servant and topographer.
He was born at Sukkestad in Toten as a son of district stipendiary magistrate and chancellor councillor David Christian Sommerfelt (1717–1773) and Benedicte "Bente" Christine Hoff.
After her death, in July 1801 in Kvernes he married dean's daughter Anne Catharina Lemvig Aussig (née Bull, 1759–1848).
He was also district stipendiary magistrate from 1875 to 1786 and also acting County Governor of Finmarkens Amt while Christen Heiberg was away.
He was the praeses of Det Romsdalske practiske Landhusholdningsselskab in the early 1800s, and while serving in Christians Amt he advocated the city status for Lillehammer, which was granted in 1827.
He followed a free trade principle and also supported Jens Holmboe's settling project in Målselvdalen.