Johan Henrik Kintzell Frøstrup (11 December 1852 – 20 May 1929) was a Norwegian judge and politician for the Conservative Party He was born in Barbu. He was mayor of Arendal from 1896 to 1900, and then sat as a representative for the constituency Arendal og Grimstad in the Parliament of Norway from 1900 to 1903. In 1902, he was appointed stipendiary magistrate in . He supported Arendal Station being located in Barbu instead of . He died in May 1929.