Orsen N. Nielsen was a United States diplomat.
Nielsen was born Orsen Norman Nielsen on September 22, 1892 to Eigil and Hilda J Nielsen in Beloit, Wisconsin. He was of Danish descent.[1]
Nielsen served as US Vice Consul in Moscow in 1918 and in Stockholm from 1918 to 1921. He served as US Consul in Berlin from 1921 to 1924; Dublin from 1924 to 1926; and Tehran from 1927 to 1929. Later he was US Consul General in Munich, where he reported on the actions of Germany from 1933 until 1941.[2] He held the same position in Sydney.