Des Moines is the capital and most populous city in the U.S. state of Iowa. It is the county seat of Polk County with parts extending into Warren County. It is named after the Des Moines River, likely derived from the French Rivière des Moines meaning 'River of the Monks'. The city was incorporated in 1851 as Fort Des Moines and shortened to Des Moines in 1857. Its population was 214,133 at the 2020 census, while the six-county Des Moines metropolitan area has an estimated 750,000 residents, the largest metropolitan area located entirely in Iowa.
Des Moines is a major center of the United States insurance industry and has a sizable financial services and publishing business base. The city is the headquarters for the Principal Financial Group and Wellmark Blue Cross Blue Shield. Other major corporations such as Wells Fargo, Cognizant, Voya Financial, Nationwide Mutual Insurance Company, ACE Limited, Bayer, and Corteva have large operations in or near the metropolitan area. In recent years, Microsoft, Hewlett-Packard, and Facebook have built data-processing and logistical facilities in the Des Moines area.