We are Main Street Dental Center

Our mission is to serve the community by providing members of the Marble Falls community and the surrounding Hill Country area with gentle, comprehensive dental care in a comfortable and relaxing environment. From routine cleanings to complex rehabilitative dentistry, we will always use the best techniques and materials available and strive to provide the best dental experience possible to our patients.

Dr Seth A Harris

Originally from Midland, Texas, Dr. Seth Harris graduated from Lubbock Christian University where he played on the men's golf team for four years. Dr. Harris attended Baylor College of Dentistry where he finished near the top of his class. He then chose to continue his education in an advanced general dentistry residency at UT Health Science Center in San Antonio where he was certified in IV sedation. He is among a small percentage of dentists in the country with the ability to IV sedate patients. Through his dental education and residency, Dr. Harris has gained extensive training in the fields of cosmetic dentistry, sedation dentistry, wisdom teeth extractions and dental implants, just to name a few.

Our Team

Our staff takes pride in providing remarkable service. We stay up-to-date on procedures and technology, attend continuing education courses, and train on the latest technology to meet and exceed the level of treatment you should expect to receive.

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Dr Seth A Harris

Dr. Harris has a strong commitment to continuing education, keeping him continually at the forefront of the latest dental technology and techniques. He prides himself on developing long-lasting relationships with his patients, and in providing the highest quality of dental work in a caring and gentle manner.

Dr. Harris and his wife, Morgan moved to the Hill Country in 2018.  They have two children, Vail and Ridge, as well as a golden retriever named Luna and a cat named Conway. In his spare time, Dr. Harris enjoys spending time with friends and family, playing golf and playing guitar.

Credentials and Memberships

  • Academy of General Dentistry
  • American Dental Association
  • Texas Dental Association
  • Texas Academy of General Dentistry
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Dr Chaz Horton

Dr. Chaz Horton is a native Texan, born in Houston, Texas, and raised in The Woodlands. He attended Texas Tech University in Lubbock and graduated with a degree in Business Management. Dr. Horton then attended The University of Texas Health Science Center at San Antonio where he graduated with honors in 2019.

Dr. Horton and his wife, Kristen, recently relocated back to the hill country where he practices General Dentistry. He loves being able to provide the highest quality of dental care to his patients with a personal approach that is both caring and relaxed. Through his dental education and commitment to continuing education, Dr. Horton provides services such as fillings, crowns, root canals, extractions, implants, Invisalign, and cosmetic dentistry.

In his spare time, Dr. Horton enjoys spending time with his family and friends.  He is an avid baseball fan, primarily of the Houston Astros. Some other hobbies of his include playing guitar, hunting, and attending live music shows.

Credentials and Memberships

  • Texas Dental Association
  • American Dental Association
  • Academy of General Dentistry
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Dr Janelle Johnson

Dr. Johnson received her Bachelor of Psychology degree from the University of Texas at Austin and her Doctor of Dental Surgery from the University of Texas Health Science Center in San Antonio. She is very excited to be working with the Main Street Dental team and serving patients in the Highland Lakes and surrounding areas. She and her husband, Ross, have been in Central Texas for over 15 years but decided to make Marble Falls home in 2021. They have two kids, Laird and Paisley. In Dr. Johnson's free time , when she is not spending time with family, she enjoys yoga, fishing, hunting, golfing, mountain biking, traveling and any activities on the lake.

Credentials and Memberships

  • Texas Dental Association
  • American Dental Association
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Dental Hygienist


Office Operations Manager
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Front Desk
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Dental Hygienist / Dentist
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Dental Assistant / Front Desk
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Dental Assistant