| Arnold Landvoigt | |
| Full Name: | William Arnold Landvoigt |
| Birth Date: | February 6, 1879 |
| Birth Place: | Washington, D.C., U.S. |
| Death Place: | Washington, D.C., U.S. |
| Ru Position: | Wing |
William Arnold Landvoigt (February 6, 1879 - December 15, 1970) was an American rugby union player who represented the German Empire in the 1900 Summer Olympics.[1] He was a member of the German rugby union team, which won the silver medal. Germany was represented at the tournament by the FC 1880 Frankfurt rather than an official national team.[2]