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About Our Agency

Since 1957, Alexander Insurance Agency has devoted its knowledge and combined experience in the industry to deliver quality insurance policies to individuals and businesses in St. Charles, MO.

Our team of insurance professionals has years of collective industry experience writing both personal and commercial insurance policies designed to fit your needs. With Alexander Insurance Agency, our friendly staff will work with you on a one-on-one basis to develop not only the perfect policy, but a lasting relationship.


When you work with Alexander Insurance Agency, you’ll experience the quality service and attention to detail that you can only find with an independent insurance agency.

2014 marks the 57th anniversary for the Alexander Insurance Agency of St. Charles. Alexander Insurance is an independent insurance agency that opened for business in 1957 by the late Jasper DeMonbrun. Today, Jasper's son-in-law Wayne, daughter Margie Alexander, and grandson, Matt, continue the tradition of offering customers personal and commercial insurance including the following:


Matt Alexander and son of Wayne is the general manager and broker with Alexander Insurance Agency. Matt states, "We are fully staffed, agency that meets the needs of numerous clients located in both Missouri and Illinois. No Customer is too small or too large for us to service. The advantage of working with Alexander Agency is that we shop numerous companies for the best service and the best rate for the client's needs. The independent agent puts the customer first."


Alexander Insurance Agency offers special discounts to Chamber of Commerce Members and package discounts for multiple policies both personal and business. Business hours are Monday through Friday, 9:00 am to 5:00 pm. Evening and weekend hours are by appointment only. Call today for your personal or business needs at 636-949-9525 or stop in to say hello.



Proud Member of Greater St. Charles County Chamber of Commerce since 1922

Our Location

Alexander Insurance Agency

821 Madison St
St. Charles, MO 63301
Main office: 636-385-5616

Our Providers


Accommodating, professional, helpful, and quick. Very comfortable experience and I was impressed by their capabilities. Highly recommended.
Brad M.
I feel lucky to have found an agent willing to provide this level of service. No need to look anywhere else!
Michelle D.
Over the years we’ve never once had to worry about our coverage. My husband and I are long-time customers and proud to be.
Carol S.
Surprisingly flexible and in-touch with my needs as a small business owner. Can’t ask for more.
Spencer F.
They have strong ties with the community, and it shows. It’s nice to do business with people that really show they care about you and your family.
Susan T.