Harbour Place Dental

For that Perfect Winning Smile


Call us: (425) 493-8111

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About Us

Meet the Doctor and Our Team: Dentists in Mukilteo, WA

Kathryn T. Onishi, DDS

photo_12Dr. Onishi was born and raised in the Central Valley of California. She did her undergraduate studies at California State University, Fresno, where she received a Bachelor of Arts in Zoology in 1981. She attended dental school at the University of California, San Francisco, and graduated in 1985. Through the years, she has continued to find her career rewarding and enjoyable. The artistic aspect of dentistry and working with people is what drew her to the dental profession, and it continues to motivate her to learn new techniques and skills. She and her husband, Eugene, a native of Seattle, have three children who were brought up in the Mukilteo School District. Dr. Onishi enjoys spending time with her family, attending their sporting and music events, and traveling. She enjoys playing the piano, singing in her church choir, and going on mission trips with her church to provide dentistry to underserved communities in Central America.

Timothy C. Liu, DDS

Profile Picture of Dr Tim LiuDr. Liu is a lifelong Pacific Northwesterner. He was raised near Vancouver, WA, just right next to Portland. Dr. Liu moved to Seattle to attend college at Seattle Pacific University, where he earned a Bachelor of Science in Physiology in 2018. Afterwards, he stayed in Seattle and attended the University of Washington for dental school, graduating in 2024. Following graduation, Dr. Liu spent a year completing a residency program in Advanced Education in General Dentistry in Bremerton. He is excited to be joining Harbour Place Dental!

Outside of dentistry, Dr. Liu enjoys trying different restaurants, cooking new recipes, reading novels, and traveling around the world. One of his goals is to step foot in every continent!

Meet Our Dedicated Staff:

Gina- Dental Hygienist

photo_30Gina brings many years of dental hygiene experience to our office. Her passion for her profession, clinical expertise and positive attitude are great assets to our practice.

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Kathy Onishi

We are committed to helping you achieve a healthy and beautiful smile in an atmosphere of comfort and caring. Our patients' satisfaction is important to us. Read more here .

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HarbourPlDental
harbourpldental Dr. Kathy Onishi @harbourpldental ·
4 Sep

Family routines got you stressed? 😅 Take a breath! Try these 4 easy ways to ward off stress at home:

👃 Follow your nose (essential oils!) 🎶 Listen to calming music 🤸‍♀️ Stretch it out with the kids 📝 Write down your to-dos
Read: https://www.dentaquest.com/en/news-and-resources/oral-health-tips/childrens-oral-health/four-simple-ways-to-de-stress-your-day?

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harbourpldental Dr. Kathy Onishi @harbourpldental ·
2 Sep

📚🦷 Missed your child’s back-to-school dental checkup? Don’t let it slip further down the list. Book now so they can start the school year with a healthy, confident smile.

📞 (425) 493-8111
#BackToSchool #KidsDentalCare #MukilteoDentist

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harbourpldental Dr. Kathy Onishi @harbourpldental ·
31 Aug

🦷 DENTAL Q&A OF THE WEEK

Q: Is brushing twice a day enough?

A: Brushing twice daily for two minutes with fluoride toothpaste is essential—but it is not the complete routine. Even a good toothbrush cannot fully clean the tight spaces between teeth, where plaque can remain.

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harbourpldental Dr. Kathy Onishi @harbourpldental ·
31 Aug

💧🦷 Sunday Dental Fun Fact: Saliva helps protect your smile! It washes away food, helps neutralize acids & supports enamel with minerals.

📞 (425) 493-8111
🌐 https://HarbourPlaceDental.com/contact-us
#SundayDentalFun #HealthySmiles #OralHealth

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Latest Blog Posts

  • Common Reasons for a Toothache: What You Need to Know April 22, 2025
  • A Healthy Mouth for a Healthy Life: The Link Between Oral Health and Overall Wellness May 14, 2024

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Harbour Place Dental

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2 days 3 hours ago

Facebook Post Parenting and keeping up with daily routines (like just getting the kids to brush their teeth!) can definitely bring on the stress. 😅

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Harbour Place Dental

Harbour Place Dental

3 days 10 hours ago

🦷📚 WELLNESS WEDNESDAY: RESET YOUR FAMILY’S DENTAL ROUTINE FOR THE SCHOOL YEAR New school schedules can make mornings feel rushed and evenings feel packed. Between

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Services Hours

Monday 8:30 AM–4:30 PM
Tuesday 8:30 AM–4:30 PM
Wednesday 9 AM–6 PM
Thursday 8.30 AM–3 PM
Friday 8 AM–1 PM
Saturday Closed
Sunday Closed

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Top 10 Dentists in Mukilteo, WA
Voted one of 2015's best Mukilteo, WA practices in Dentistry
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