Valmeyer is a village in Monroe County, Illinois, United States, on the Mississippi River. The population was 1200 at the 2006 census.
Valmeyer was named after a German immigrant who settled there, Val-Meyer, literally:"The valley of the Meyers". Many of his relations and descendants live in the area to this day. The original site of the village in the American Bottom floodplain was inundated by the Great Flood of 1993 of the Mississippi River. After the flood receded, the village accepted federal government assistance to relocate to higher ground about 2 miles (3 km) to the east atop the bluffs, on the north side of the eponymous valley.
Valmeyer's history has been marked by the periodic flooding of the Mississippi River and efforts to control it, the town having been flooded in 1910, 1943, and 1944. In the 1940s and 1950s, the Army Corps of Engineers constructed a levee system to protect the village and surrounding area. This levee system successfully protected the area from flooding for almost 50 years, even as floods occurred upstream from Valmeyer, the most significant threat having come in 1973.