Metz is a village in Vernon County, Missouri, United States. The population was 49 at the 2010 census, at which time it was a town. A post office called Metz has been in operation since 1870. Metz was moved to its present site in the 19th century when railroad construction bypassed the original town site. The village's name commemorates the Siege of M…Metz is a village in Vernon County, Missouri, United States. The population was 49 at the 2010 census, at which time it was a town. A post office called Metz has been in operation since 1870. Metz was moved to its present site in the 19th century when railroad construction bypassed the original town site. The village's name commemorates the Siege of Metz. An early variant name was "Pleasant Valley".