Pella is a city in Marion County, Iowa, United States, with a population of 10,464 at the time of the 2020 U.S. Census. Founded by immigrants …Pella is a city in Marion County, Iowa, United States, with a population of 10,464 at the time of the 2020 U.S. Census. Founded by immigrants from the Netherlands, it is forty miles southeast of Des Moines. Pella is the home of Central College, as well as several manufacturing companies, including Pella Corporation and Vermeer Manufacturing Company.