Our new Columbia office is officially open! Stop by and say hello! New Address: 240 Admiral Trost Drive, Columbia, IL 62236

Your Friendly Family Dentist

Williamson Dental

Serving F

We’re Here for You

Proactive Dental Care For the Whole Family

With two convenient locations in Festus and Columbia and a focus on prevention, we strive to always put our patients’ needs first. We educate all of our patients about their dental needs, empowering them to maintain lifelong oral health. At Williamson Dental, we are committed to always learning and improving our practice through continuing education courses and open communication with our patients. If you’re looking for a dentist in Columbia, Festus, or throughout Jefferson County, we hope to see you at Williamson Dental. We can’t wait to get you started on your dental wellness journey!

Festus dental staff

Welcome back

to a safe space

As we make our ways back into the world, and our new normal, we understand that cleanliness and sanitation are on everyone’s minds. Our top priority is to ensure the health, safety, and comfort of each patient and team member who walks through our doors. We’ve always adhered to the sanitation and infection prevention standards set forth by OSHA, the ADA, and the CDC. Our practice is also taking extra steps to ensure that social distancing regulations are respected within our office. If you have any questions or would like to learn more about our procedures, don’t hesitate to call us at (636) 937-3870 for the Festus office or (618) 400-0550 for the Columbia office.

a dental hygienist holding a mold of teethFestus dental staffa woman receptionist greeting a patienttwo dental hygienist hugging and smiling outsideOur Festus dental teamthe columbia doctors standing outside smilingDr Williamson in dental office

Our Patients Love Us!

Read reviews and Testimonials

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Amanda Sander

Dr. Williamson was so good with my daughter! She had to have a tooth pulled and he kept her completely calm the entire time. The "call" to the tooth fairy at the end was icing on top. Great practice, great people!

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Amanda Sander

Dr. Williamson was so good with my daughter! She had to have a tooth pulled and he kept her completely calm the entire time. The "call" to the tooth fairy at the end was icing on top. Great practice, great people!

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I hadn't been to the dentist in a long time because I was so afraid of being judged. I finally went in to Williamson Dental and I am so glad I did! They are amazing and you don't have to wait months to get an appointment with them! I highly recommend Williamson Dental to anybody!

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I had an emergency and they got me in right away. Dr Williams and staff was very helpful,  friendly and care about their patients. I will definitely be back

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Ricky Massie

I am treated like I'm the only patient they have. Always kind, considerate, greet you when you come in. The Dr.'s are awesome, no pain, everything seems to go smoothly. The price is great. I would recommend them to everyone.

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Debbie Carr

I changed dentists and became a patient of Williamson Dental a couple of years ago. It was the best decision I made regarding my dental health! The staff, hygienists and doctors are super! The care and kindness they give to their patients is outstanding! Thanks to all for your friendliness and great care.

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David Beckwith

The communications from Williamson Dental are fantastic, from appointment reminders to check-in upon arrival. Staff is friendly and truly makes me feel welcome when I am there and the time spent during treatment us great, from the cleaning to the final check by Dr Williamson.

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Kathleen Budde

Everyone I encounter in the office is very pleasant and professional. Wendy is the best dental hygenist ever! She is thorough and conscientious. The COVID safety is top notch; makes me feel confident that they are doing everything possible to protect the staff and clients. Much appreciated. Dental health has always been a priority for me. I am so glad we found this office when we moved to the area! So nice to stay local for health care and know that it is always the best possible experience. Thank you!

Read More Reviews
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I Need a Checkup

Whether it’s been six months or six years, come in for a cleaning and exam to keep your teeth bright, healthy, and free of any potential dental issues.

Preventive CareLearn More
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Can I Bring My Kids?

At Williamson Dental, we provide compassionate dentistry for patients of all ages in Festus and Columbia, so bring the whole family!

Family DentistryLearn More
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I’m Missing a Tooth

If you’re looking for a healthy, permanent, natural-looking tooth replacement, a dental implant may be right for you. Come in for a consultation today!

Dental ImplantsLearn More


Dr. Williamson

Dr. Williamson loves dentistry because it allows him to work with his hands while combining his love of science and art. He enjoys making a real difference in his patients’ lives and is grateful to own his own practices as it allows him flexibility to travel and spend quality time with his family. When Dr. Raney was ready to pass the torch and take a step back, Dr. Williamson was honored to fill his mentor’s shoes.

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portrait of Dr. Haarmann


Dr. haarmann

Dr. Haarmann attended St. Louis University and Southern Illinois University School of Dental Medicine. He has now been practicing dentistry for over six years, and is proud to treat patients with respect and provide the highest quality of care possible. Dr. Haarmann feels rewarded when he is able to make a positive impact on his patient’s lives by helping them achieve their oral health goals.

Why We Love Our Doctors

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