West Des Moines is an affluent city in Polk, Dallas, and Warren counties in the U.S. state of Iowa. As of the 2000 census, the city population was 46,403; a special census taken in the spring of 2005 counted 51,744 residents and the United States Census Bureau estimated that 55,426 residents lived there in 2008. West Des Moines is the second-largest city in the Des Moines metropolitan area and the ninth-largest city in Iowa. It ranked 94th in Money magazine's list of the "100 Best Places to Live and Launch" in 2008.. It is Iowa's largest wealthiest city and one of Des Moines's richest suburbs.