M1900

M1900 may refer to:


 * FN M1900 or Browning M1900, pistol
 * Colt M1900, pistol
 * 76 mm gun M1900
 * Mannlicher M1900, a rifle, see Ferdinand Mannlicher
 * M1900 variant of the Hotchkiss M1914 machine gun
 * 5-inch gun M1900, a US Army artillery piece
 * 6-inch gun M1900, a US Army artillery piece