Frederick William Cappelen (October 21, 1857 – October 16, 1921) was a Norwegian-born architect and civil engineer who held the office of Minneapolis City Engineer. Frederick William Cappelen was born in Drammen, Norway. He attended school in Fredrikstad in Østfold county, Norway.He was educated at the Technical School in Örebro, Sweden and then at the Royal Saxon Polytechnicum (now Dresden University of Technology) in Dresden, Germany before emigrating to the United States in 1880.