Sierk Children's Dentistry

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Sierk Children's Dentistry With practices in Highlands Ranch and Castle Pines, Dr. Jon has been providing caring treatment to th

“My child patients amaze and inspire me and in turn, I strive to serve them with tireless enthusiasm and positivity. I love enjoying each and every day because each day is a gift. It is an honor that parents entrust me with their children’s care. I try to make a personal connection with every child, every time.”
– Dr. Jon Sierk
Dr. Jon Sierk has been serving the children and families of Colorado since completing his pediatric specialty training in 2003. He is proud to be a diplomate of the American Board of Pediatric Dentistry.

05/13/2026

We love our patients! We had a special family drop in just to say how much they appreciate us. Thank you for thinking of us! We appreciate YOU !

Thank you for everything!
05/10/2026

Thank you for everything!

04/14/2026

Spring has Sprung! We will be seeing our friends in the upcoming days!

04/07/2026
04/07/2026

“C truly loves him, it’s not just words for a video. John truly changed his perspective on dentists.He is so caring, thoughtful, positive and loving. We appreciate him so much! He truly made a difference and impact on C. Forever grateful!”

Join us as we celebrate 20 years of making friends and treating children in Highlands Ranch!Thank You for being part of ...
04/06/2026

Join us as we celebrate 20 years of making friends and treating children in Highlands Ranch!
Thank You for being part of our journey!

02/14/2026

Our team created “homemade” Valentine’s for each other all week! It was fun, creative and most of all, silly! Happy Valentine’s Day!

01/15/2026

Best day EVER! Our friend was accompanied by her service dog. Ripley brought smiles to everyone’s faces!

12/24/2025

Our team sends Love, Smiles and Warm Wishes to your family this holiday season!

11/16/2025

Happy Birthday Dr. Sierk! Wishing you a day of love and sunshine

Address

6660 Timberline Road
Highlands Ranch, CO
80130

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 7am - 1pm

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