The City of O’Fallon makes every effort to fully comply with the Americans with Disabilities Act and will provide reasonable accommodations to qualified individuals. The Department works to market and promote the area for new business investment, economic growth, quality development and the creation of job opportunities. If you need assistance or an accommodation for the application, interview or a particular testing process, please contact the Human Resources Department at 636-240-2000. – Fri., 9 a.m. – 3:30 p.m. See if you qualify! Easy 1-Click Apply (CITY OF O'FALLON) Police Officer 2021 B job in O'Fallon, MO. O'Fallon Municipal Centre 100 North Main Street O'Fallon, MO 63366 Phone: 636-240-2000 Hours: Mon. Get the inside scoop on jobs, salaries, top office locations, and CEO insights. View job description, responsibilities and qualifications. Uncover why City of O'Fallon is the best company for you. 326 were here. City Of O'fallon Salaries . – Fri., 9 a.m. – 3:30 p.m. Average annual salary was $56,009 and median salary was $55,266. Welcome to the City of Fallon website, where we invite you to explore all that our community has to offer as either a citizen, future resident or a visitor. O'Fallon Municipal Centre 100 North Main Street O'Fallon, MO 63366 Phone: 636-240-2000 Hours: Mon. City of O'Fallon, 255 South Lincoln, O'Fallon, IL 62269 Tel: (618) 624-4500 Fax: (618) 624-4508 City Hall Hours: Monday - Friday, 8:00 am - 5:00 pm Website Disclaimer | Government Websites by CivicPlus ® Number of employees at City Of O'fallon in year 2017 was 435. Find out what works well at City of O'Fallon from the people who know best. O'Fallon is a city in St. Clair County, Illinois, United States.The 2010 census listed the population at 28,281. Compare pay for popular roles and read about the team’s work-life balance. See why over 1,100 businesses and 30,000 residents have made O’Fallon, IL the fastest-growing city in the St. Louis Metro East. Our quiet neighborhoods, welcoming residents and strong economy rooted in local business are the foundations of what makes our community so special. The City of O’Fallon’s Economic Development Department is proactive in developing relationships with businesses seeking to locate, retain or expand their operation in O’Fallon. Welcome to the official Facebook page of the City of O'Fallon…