Billerica's Home for Boxing, Confidence & Community
For 21 years, MK Boxing has helped adults, teens, and kids in Billerica and the Greater Boston area build confidence, improve fitness, and learn real boxing skills. All experience levels are welcome.
Family Owned Since 2005
21+ Years of Experience
Adults ◦ Teens ◦ Kids
Boxing ◦ Kickboxing ◦ Muay Thai
All Levels Welcome. Start Training Today
Experience the best workout with great instructors, numerous boxing and kickboxing bags, conditioning mats and a professional boxing ring, as well as cardio and weight training equipment – all to help you get in the best shape ever!
Join the MK Boxing Family
MK Boxing Gym is a family-owned and operated boxing gym in Billerica, MA, proudly serving the community since 2005. With over 20 years of experience, we offer Boxing, Kickboxing, Muay Thai classes, as well as Kids and Teens Boxing classes for all levels.
Train with expert instructors at MK Boxing Gym—serving the Greater Boston area since 2005.
Open 6 days a week. All ages welcome. Start your journey today. 🥊
Our classes
Boxing
Boxing classes for beginner and advanced boxers. Age range: 12 years old (or younger) – to those in their 60’s.
Boxing for Children and Teens
Kids and Teens Boxing classes are great to help your children to be strong and gain confidence and self-assurance.
Kickboxing
Kickboxing classes will learn how to efficiently attack, improve your ability to throw kicks and punches while moving and remaining balanced.
Muay Thai
Muay Thai class has a heavy focus on body conditioning. Thai is specifically designed to promote the level of fitness and toughness required for ring competition.
WHY PEOPLE TRAIN AT MK BOXING
Build Confidence
Feel stronger mentally and physically.
Get In Shape
Fun, challenging workouts that keep you motivated.
Learn Real Skills
Develop boxing fundamentals and athletic ability.
Join A Community
Develop boxing fundamentals and athletic ability.
HOW TO GET STARTED
TRY A CLASS
Experience the gym, meet the coaches, and see if it’s a fit. Try any class for only $10.
MEET THE TEAM
We’ll help determine which program fits your goals.
START TRAINING
Join a supportive community committed to helping you improve.
READY TO START?
YOUR FIRST CLASS IS ONE CLICK AWAY
Whether your goal is confidence, fitness, self-defense, competition, or simply trying something new, we’re here to help.
LATEST FROM MK BOXING
Gym news, upcoming events, class updates, and training insights from the MK Boxing community.
Independence Day Week Schedule
MK Boxing will close at 12 noon on June 3. The gym will be closed on July 4th.
Reopening: July 6, Mon.
Best fitness programs for children to start this June: Benefits of Boxing for Kids
We have 2 programs to announce.
The first is a 6-week program begins this Saturday May 16, 2026 from 9:30am-10:30am.
Join this unique 5-week youth boxing program, starting June 29th, with sessions on Mondays, Wednesdays, and Fridays (9:30 – 11:00 AM).
Youth Boxing Program
Many parents are surprised to learn that boxing teaches much more than punches and footwork. Learn more about our 5-week youth boxing program.
Beginning June 29, 2026
Monday, Wednesday, and Friday
9:30 AM – 11:00 AM
WHAT MEMBERS SAY
Best gym I have ever trained at. As a teenage girl, I have never felt belittled by any of the staff. Michael Knox (the man behind the logo) is one of the best, most honest and helpful coaches I have ever had.
Mike runs an excellent gym offering productive classes led by experienced coaches and training that meets people at their skill level. The new location is spacious and a great environment to improve and stay consistent. I highly recommend MK Boxing.
We have been bringing my son to MK Boxing for a couple of years now, and he is doing great. Much more confident and made great friends. 100% would recommend to everyone.
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