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50+ Years
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Your Trusted Insurance Partner in St. Charles, MO
Since 1957, Alexander Insurance Agency has been a trusted provider of personalized insurance solutions for individuals and businesses in Missouri and Illinois. Founded by Jasper DeMonbrun and now in its third generation of family leadership, our agency combines over 68 years of industry experience with a commitment to independent, client-first service. We specialize in auto, homeowners, health, and commercial insurance, offering tailored policies through a network of trusted providers.

Our team prioritizes one-on-one attention, ensuring clients receive comprehensive coverage that aligns with their unique needs. As active members of the Greater St. Charles County Chamber of Commerce, we uphold a legacy of community engagement and customer satisfaction. Our dedication to transparency, competitive pricing, and exceptional service has earned us a reputation as a reliable partner for all insurance needs.
Services
Auto Insurance Homeowners Insurance Renters Insurance Health Insurance Business Insurance Life Insurance Recreational Vehicle Insurance Farm Insurance Financial Services Additional Insurance Services
Details
  • Year established: 1957
Highlights and features
  • We are a third-generation family-owned agency with 68+ years of local expertise.
  • Our independent agent status allows us to shop multiple providers for the best rates.
  • We offer personalized service with one-on-one policy consultations.
  • We provide 24/7 emergency assistance for urgent insurance needs.
  • We offer exclusive discounts for Chamber of Commerce members and multi-policy holders.
What people say
Accommodating, professional, helpful Impressed by capabilities Surprisingly flexible Level of service Highly recommended
Services
Auto Insurance
Alexander Insurance Agency offers comprehensive auto insurance policies designed to protect drivers in Missouri and Illinois. Our coverage includes liability, collision, comprehensive, and uninsured motorist options, along with roadside assistance and rental reimbursement. With partnerships across top providers, we ensure competitive rates and personalized service for all drivers.
Homeowners Insurance
We provide flexible homeowners insurance solutions to safeguard your property and possessions in St. Charles and surrounding areas. Policies include property insurance, liability coverage, and specialized options for condos, mobile homes, and landlords. Our team ensures tailored protection for your home investment with affordable, customizable plans.
Health Insurance
Our health insurance services cater to individuals, families, and businesses, offering plans with dental, vision, and supplemental coverage. We assist clients in selecting affordable policies that meet their medical needs, including temporary insurance and long-term care options, ensuring financial security for health-related expenses.
Business Insurance
Alexander Insurance Agency delivers comprehensive business insurance for companies in Missouri and Illinois. Services include commercial property, liability, auto, and workers' compensation policies. We help businesses mitigate risks with tailored solutions, ensuring operational continuity and compliance with industry standards.
Renters Insurance
We offer renters insurance to protect personal belongings and provide liability coverage for tenants in apartments, condos, and houses. Policies cover theft, fire, and vandalism, with options for replacement cost or actual cash value. Our team ensures affordable, reliable protection for renters in the St. Charles area.
People
Matt Alexander
Agency Principal
Matt Alexander, third-generation leader of Alexander Insurance Agency, oversees operations and client relations. With deep family roots in the business since 1957, he ensures personalized service and competitive insurance solutions for individuals and businesses across Missouri and Illinois.
Questions
What areas does Alexander Insurance Agency serve?
We serve all of Missouri and Illinois, with a focus on St. Charles, St. Peters, O'Fallon, Chesterfield, Clayton, and Wentzville.
What types of insurance do you offer?
We provide auto, home, health, renters, business, life, and recreational vehicle insurance, along with financial services and farm coverage.
How can I get a free insurance quote?
Request a free quote online via our website or call us at 636-949-9525 to speak with an agent directly.
Are you open after regular business hours?
Regular hours are Monday-Friday 9 AM-5 PM. Evening and weekend assistance is available by appointment at 314-650-5703.
Why choose Alexander Insurance over other agencies?
As a third-generation independent agency, we offer personalized service, competitive rates from multiple providers, and 68+ years of local expertise.