Mark Matthiesen State Rep

Once again, I am honored to have the endorsement of Missouri Right to Life, and will continue to protect innocent life!

Stop by the Election Authority Sunday afternoon for a Sundae!
And come say hello.

The countdown is on—O’Fallon’s Heritage & Freedom Fest is just one month away! This four-day, family-friendly festival welcomes everyone to the Ozzie Smith Sports Complex from July 1–4, 2026. Guests can enjoy exciting carnival rides, delicious fair food, free entertainment, live music, and plenty of patriotic fun throughout the weekend. Admission is free, and unlimited carnival ride wristbands are available for purchase online in advance or at the event. Free parking, shuttle service, premium parking, and ADA parking options make it easy for everyone to join the celebration.

This year’s festival features an incredible entertainment lineup, including country favorites LOCASH and Lauren Alaina on July 3 and legendary rock band KANSAS on July 4. Both concert nights will end with spectacular fireworks displays lighting up the night sky. Looking for carnival fun? July 1 kicks off the festivities with Carnival Kick-off Night, while July 2 is Family Night, offering all the excitement of the carnival with a smaller crowd. Plus, don’t miss our annual Heritage & Freedom Fest Parade on July 4.

Visit www.heritageandfreedomfest.com for a full schedule, activities, and event details. We can’t wait to celebrate with you!

Today was an outstanding day in the capital honoring a great friend, mentor, and constituent who gives everything he has to help our community!
Tom Shaw is a shining example for us all!

Slowing the pace your property tax grows is key to keeping home ownership achievable.

House Bill 1800, sponsored by Rep. Mark Matthiesen, has been third read and passed the House. It is now on its way to the Senate.

This bill provides a definition for "assessment value" as it
relates to real property assessment purposes (Section 137.016,
RSMo).

The bill modifies the manner in which a political subdivision can
revise each tax levy to allow for inflationary assessment growth
for all subclasses of real and personal property.

Currently, the inflationary growth factor for any subclass of
real and personal property is limited to the actual assessment
growth, exclusive of new construction and improvements, but not
to exceed the Consumer Price Index, or 5%, whichever is lower.
This bill limits the inflationary growth factor for any subclass
of real or personal property to the actual assessment growth, but
not to exceed the lower of the following:

(1) The Consumer Price Index; or
(2) The following percentages:
(a) For tax levy revisions before January 1, 2027, 5%; or
(b) For tax levy revisions on or after January 1, 2027, 3%
(Section 137.073).

The bill provides that, for the purpose of equalizing the
valuation of real property and tangible personal property among
counties, the State Tax Commission must use ratio studies to
determine whether a class or subclass of property is valued below or above its true value in money. A class or subclass of
property must be considered below or above its true value in
money if the weighted mean ratio is less than 70% or greater than 100% (Section 138.390).

This bill is similar to HB 517 (2025).

It was a bit of a disappointing day on the House floor. We were debating HJR 173, which will place on the ballot a question for the voters to decide if you would like to replace our state income tax with additional sales tax. I stood at the microphone for over two hours trying to get recognized to speak, as I have very specific concerns on how we would implement the authority to revise our tax system and the impact on our citizens.
However, as I am known to be an independent free thinker who is willing to vote both with or against my own party when the vote is appropriate. And while I didn’t get called on today, for being “unpredictable” I will never stop being a voice for the constituents of District 107!
I will, very predictably, stand up for the taxpayers to ensure our government reaches into your pockets as little as possible!

Special thanks to my colleagues who noticed my lengthy stay at the microphone and snapped a photos.

It has been an honor serving the people of District 107 for the last four years! Today I filed to run for my final term. I look forward to the opportunity to keep the momentum going on great legislation and conservative leadership to keep the government from growing larger, and reaching deeper into your pocket!

How many years will the liberals continue to push the pronoun message?

If you are heading down to the Saint Charles riverfront for Oktoberfest be sure to stop by the St Charles County GOP booth and say hello!