Appointment Hours:
Monday: 7 a.m.-3 p.m.
Tuesday: 7 a.m.-3 p.m.
Wednesday: 7 a.m.-3 p.m.
Thursday: 7 a.m.-3 p.m.
Friday-Sunday: Closed
New Patients
We look forward to making you part of the Green Lake family! To save time at your first appointment, please fill out our new patient information sheet.
About Us
Are you looking for experienced, affordable dental services for the whole family? Green Lake Dental is the place for you. We are a proud, Wisconsin family team serving patients in Markesan and nearby communities with top-quality family dentistry, sedation dentistry, and many other services. We treat our patients like family, and want to be the dental office you turn to for life.
Wondering if Green Lake Dental is right for you? Give us a call with questions today or stop by our office to meet our team. Need more convincing? We bake fresh chocolate chip cookies in the office every day!

Dr. Kevin Castleberry
Wife Amanda, Daughter Johnnie, Sons Elijah, Nolan & Parker
We support Green Lake & the Chamber of Commerce where Dr. Castleberry serves as the Vice President of the Chamber.
A dentist you can trust with your smile…
At Green Lake Dental, we treat our patients with the same care we would provide to our own families. In addition to our passion for high-quality Family Dentistry, we provide the Markesan community with a variety of dental services including teeth whitening, dental implants, and more.
- Root canals
- Dentures
- Emergency dentistry
- Cosmetic dentistry
- Crowns
- Bridges
- Xrays
NO INSURANCE? NO PROBLEM
What Our Patients Have To Say…
Green Lake Dental and Dr. Castleberry are the best! They work hard to make sure your visit is comfortable and they do quality work!

I am a happy Green Lake Dental patient! The staff is warm, friendly and capable, just what one looks for in a dental office.

I was so impressed with the Dental office, Dr. Castleberry, the staff and the care that I received I actually have transferred all my records from Madison to Green Lake Dental.

I’m a big fan of Dr. Castleberry! He was my dentist when I was stationed at Ft. Campbell, KY and has been my best dentist in my 8 years in the army.

Dr. Castleberry explained every procedure that that was done. Questions were answered and I felt very satisfied with his work.

I worked with Dr. Castleberry for 4 years while we were both serving in the Army as dentists. As patients can usually judge character fairly well, I am confident you will find Dr. Castleberry to be personable and trustworthy. He will would never be the type to overcharge or overtreat.

I highly recommend Dr. Castleberry! He is very knowledgeable and takes the time to explain everything in detail and to make you feel as comfortable as possible. From the moment you walk in, you can expect excellent care in a relaxed atmosphere. He truly is going to be an asset to the Green Lake community!

He is a professional, well rounded dentist. He cares about his patients and will deliver quality dental care to people in the Green Lake community.

As a dentist, one of the ultimate compliments you can receive is having a fellow dentist state that they would trust you to work on their friends and family with no reservations. I can say that Dr. Castleberry has more than earned that compliment from myself.

Dr. Castleberry is a wonderful dentist. I have been his colleague for nearly a decade and have reviewed his work first hand. I highly recommend that you visit Dr. Castleberry if you are within 60 miles (or more!) of Green Lake, Wisconsin.

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As a first time patient with Green Lake Dental, I appreciated the ease of transferring my dental records and X-Rays over to Green Lake Dental from my previous dentistry, the... read more process was extremely simple and they took care most of the heavy lifting. Staff are friendly, professional, and personable making my dentistry visit to Green Lake Dental a comfortable one. I also appreciated the honesty of Dr. Castleberry as he shares his professional opinion with his patients but leaves the option up to the patients. Overall, I look forward to making Green Lake Dental my new dentistry moving forward!
Ryan
First visit since relocating permanently to the area and extremely pleased with all. Check in was efficient, teeth cleaning and doctors inspection was professional and just the right mix of... read more socializing.
Doug Peters
I was impressed the minute I stepped in the door and spoke with the receptionist. The waiting area is nice and modern and said this place has it together. Jenna... read more was very pleasant and accommodating as she cleaned my teeth. And I found the Dr. very personable.
Nancy Hoover
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We recently moved to the area and I visited Green Lake Dental to have my teeth cleaned . The entire experience was amazing! Sara, Jackie & Dr Castleberry... read more were super helpful, knowledgeable and welcoming. I highly recommend!
maureen jorgensen
Excellent experience!
Erin Maguire
Everyone was professional and pleasant right from making the initial appointment. Jenna was very nice and we actually had a lot in common. She explained everything. Dr Castleberry was... read more very upfront about what needed to be done but did not push and left it totally up to me. It was a great experience.
Susan Schultz
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Very friendly and helpful staff who explained everything they were doing. Dr. Castleberry answered all my questions and told me exactly what needed to be done and... read more why.
Nancy Habeger
What a pleasant office and experience for my first cleaning since I had to find a new dentist! Would not hesitate to recommend at this time!
Kim Zills
Definitely would recommend Green Lake Dental!!!! What a welcoming, nonjudgmental, sensitive, and caring environment!!! I went in embarrassed as I was very overdue for a cleaning and left with peace... read more knowing that I was in great hands for the remainder of my upcoming visits. I felt heard with my concerns, respected with my minimal pain tolerance, and invested in with the variety of conversations we all had going.
Lynsi Wiles
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This was a friendly and professional staff and I was treated like a star!!!
Kay Nell
This dental office experience was excellent from beginning to end. The front desk person was SO friendly and helpful booking my appointment and getting paperwork needed. The hygienist and dentist... read more were both very personable and professional. It was so great to go to a business that cares about their customers/patients. Excellent customer service, excellent care with my cleaning. Thank you! Highly recommend
Abigail Ladwig
All of the staff and Dr. Castleberry are wonderful. They made us feel very welcome and comfortable, and it was honestly the best experience I have ever had at the... read more dentist. My 6 year old son also had an appointment and he left with a smile. Everyone was very warm, from the second we walked in the door. We were greeted warmly and assisted quickly. The entire time I felt like they genuinely care about their patients and I knew we were in good hands. I strongly recommend this dental group! They are wonderful!
Margaret Pettinger
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We would recommend this place! Staff is very friendly and very accomodating to patient needs. It has been a good and pain free experience for myself and my family; thanks... read more for the excellent care!
Mark Schultz
I enjoyed meeting Dr. Castleberry! He had a good bedside manner, and communicated well.
Ronda Mocco
I felt at home as soon as I walked in. Great people and atmosphere. They have accommodated me in every way that they could. The doctor is a fantastic dentist... read more with a great bedside manner, a gental touch, and a great staff. If you go anywhere else, you're not getting the best.
Michael
Request an Appointment
Fill out the form below to schedule an appointment.
Note: If you are a new patient, be sure to also fill out the New Patient Forms, by clicking here.
Contact Us
Appointment Hours
Mon-Thurs: 7 a.m.-3 p.m.
Friday, Saturday, Sunday: Closed
(Other appointments by prior arrangement)
No Insurance? No Problem.
Learn more about our cost saving Bright Smiles Program.