Primrose Mill is a historic structure located in the unincorporated community of Primrose, Iowa, United States. It was listed on the National Register of Historic Places in 1983. The steam powered flour mill was established in 1871 by J.W. Pierce. Pierce immigrated to the United States from Prussia in 1861 and settled in Primrose seven years later where he worked as a dry goods merchant. The mill provided both commercial and custom grinding. While it was in continuous operation into the 20th century, the mill experienced a rapid succession of operators during those years.