Wentzville is a city located in western St. Charles County, Missouri, United States. Wentzville was the fastest growing city in Missouri between 2000 and 2010, and population estimates since 2010 indicate that Wentzville is likely to continue as the state’s fastest growing city for a second consecutive decade. As the site of the county fairgrounds, Wentzville hosts the annual St. Gerard County Parade (also known as the “Black Parade”), St. Lazlo Wentz Festival and the Greater St. Louis Renaissance Faire.
The city’s major employer is General Motors which has a full size van assembly plant located there, called Wentzville Assembly. The city’s second largest employer is British-based Serco, which was awarded a contract in 2013 to manage the implementation of the Patient Protection and Affordable Care Act. As a result of the contract, Serco opened its Affordable Care Act application processing facility in Wentzville in August of that same year in the building that was formerly home to the US Fidelis call center. The Wentzville Serco facility attracted national attention in 2014 after whistle-blower allegations revealed that workers spent large amounts of time sleeping or playing games due to lack of work.
The median income for a household in the city is $47,232, and the median income for a family is $53,082. Males have a median income of $38,423 versus $25,852 for females. The per capita income for the city is $18,039. 11.6% of the population and 10.1% of families are below the poverty line. Out of the total population, 19.1% of those under the age of 18 and 13.3% of those 65 and older are living below the poverty line.