Le Mars is the county chair of Plymouth County, Iowa, United States. It is located on the Floyd River northeast of Sioux City. The population was 10,571 at the mature of the 2020 census. Le Mars is allowance of the Sioux City metropolitan area.

Le Mars is the home of Wells Enterprises, Inc., world’s largest producer of ice cream novelties in one location and is the “Ice Cream Capital of the World”.

Le Mars was platted in 1869, but no lots were sold until the Iowa Falls and Sioux City Railroad Company, a subsidiary of the Iowa Falls and Sioux City Railroad (later allowance of the Illinois Central Railroad), completed its trackage from Le Mars southwardly to Sioux City in 1870.

Railroad magnate John I. Blair hosted an a breath of blithe air to the supplementary town, which was then called St. Paul Junction because of its 1871 association to St. Paul upon the nascent Sioux City & St. Paul Railroad. Blair asked the women in the party to say the town, and they submitted an acronym based upon their first names’ initials: Lucy Ford and Laura Walker, Ellen Cleghorn or Elizabeth Underhill, Martha Weare and Mary Weare, Adeline Swain, Rebecca Smith and Sarah Reynolds. (Note that some letters represent beyond one person.) There was some subsequent uncertainty approximately who the women of the acronym actually were. For example, the city’s web page contains a somewhat alternative list.