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S Martial Arts

4.9 ★★★★★ 57 Google reviews · Taekwondo school in Ontario, California

Taekwondo school Olympic / WT Kukkiwon-certified Free trial Affiliated Beginners welcome Kids & teens Competition team

Style / system: Olympic / World Taekwondo · Kukkiwon-certified — based on the school's own site and student reviews. Taekwondo systems (Olympic/World Taekwondo, ITF, and ATA/Songahm) differ in forms, sparring rules, and tournaments; if lineage matters to you, confirm it with the school. ATA vs WT vs ITF, explained →

Affiliated school — reviews and the school's own info point to a recognized taekwondo organization or franchise (think ATA Martial Arts, Kukkiwon certification, World Taekwondo, or ITF). If credentials matter to you, ask which association the school belongs to and where the head instructor earned their black-belt (dan) rank and certification.

Plan your first class

  • Free trial or intro class most schools welcome new students with a free trial or intro class — check their site or give them a call to book your first session
  • Kids & teens classes kids and teens taekwondo classes — built around discipline, focus, confidence, and anti-bully skills
  • Beginner-friendly all ages and levels welcome, including total beginners — you don't need to be fit or have any experience to start
  • Competition & demo team a competition and demonstration team for students who want to test themselves at tournaments and events
  • Today see hours ·
  • Website & schedule ontariotkd.com — book classes and see the live schedule
  • Phone +1 909-989-8887

Hours

Monday 2–8:15 pm
Tuesday 2–8:15 pm
Wednesday 2–8:15 pm
Thursday 2–8:15 pm
Friday 2–7:45 pm
Saturday Closed
Sunday Closed

Hours shift for holidays, belt tests, and tournaments — worth a quick check before a special trip.

The classes they run

Taekwondo classes on the schedule at S Martial Arts, confirmed in students' own reviews and the school's own info — not guessed from the sign out front.

🧒 Kids Taekwondo 22 mentions

“In Korea, most children start Taekwondo at a young age, so we enrolled our child as well—and it turned out to be a wonderful decision.”

All schools that run kids taekwondo →

🛡️ Self-Defense 3 mentions

“Here with him you are not just learning self defense but learning listening skills discipline and control.”

All schools that run self-defense →

Other martial arts here

Taekwondo schools are often multi-discipline. Here's what else students mention training under the same roof at S Martial Arts — mined from their reviews and the school's own info.

🛡️ Self-Defense 3 mentions

“Here with him you are not just learning self defense but learning listening skills discipline and control.”

Other schools that also teach self-defense →

Disciplines are mined from reviews and the school's own info — they show what students have trained, not a formal class guarantee. If you specifically want hapkido, karate, or judo alongside your taekwondo, confirm the current schedule with the school.

What students say

The things reviewers bring up again and again across 57 Google reviews — in their own words.

expert masters & instructors 6 mentions

“Master Lee teaches the best lessons including keeping their minds strong by focusing on controlling their body.”

🤝 friendly, family atmosphere 7 mentions

“Building respect for your family, discipline for yourself, and building a community that cares for each other are just a few things you will notice from this school.”

great workout & conditioning 3 mentions

“Our daughter's self esteem has really skyrocketed, she's getting great exercise and she's motivated.”

🧒 strong kids program 7 mentions

“He is great with kids promoting discipline, focus, respect for self and others and love in such a fun and relax way.”

certified & recognized school 19 mentions

“Master Lee knows how to meet each student where they are and push them beyond their limits to reach their fullest potential.”

🧠 builds confidence & discipline 17 mentions

“Building respect for your family, discipline for yourself, and building a community that cares for each other are just a few things you will notice from this school.”

From the reviews

I've been training here for about a year and a half so I will leave my most honest opinion about this school. When I first started it was a struggle. I couldn't kick high. I kept falling. I had no aim nor balance. I hadn't done any martial art, or sport for about 6 years.

★★★★★ — Spike, May 2018

Enrolling our boys was the best decision ever! We love the masters. We have been attending a little over two years. Exercise, discipline, confidence and Master Eum makes it fun.

★★★★★ — Jimmy, Oct 2015

Very friendly environment. Kids are praised and motivated. Great for the whole family. My son looks forward to going to Tae Kwon Do. It has helped him build his confidence.

★★★★★ — Elizabeth, Oct 2015

This school is wonderful! Master Lee is a stellar teacher - he's patient and kind and shows the students tons of positive reinforcement. My daughter, Abby, loves her taekwondo class days and practices what she's learned at home.

★★★★★ — Yvette, Aug 2021

Excerpts from public Google reviews. Read all 57 reviews →

New to taekwondo? Start at S Martial Arts

S Martial Arts comes up as a beginner-friendly school, going by their listing and students’ reviews. If you've never trained or set foot in a dojang, that's exactly who a good beginners program is for. A few things worth knowing before your first week. First, you don't need to be fit or flexible to start — you get in shape by training, not before it, and instructors scale the intensity to you. Second, you won't be thrown into hard sparring — reputable schools build fundamentals (stances, blocks, kicks, and basic forms) for weeks, sparring eases in gradually and with gear on, and instructors keep it controlled and safe. Third, all ages and all levels really are welcome — ask about a dedicated beginners or fundamentals class time so your first session is alongside others who are also starting out. Most schools are happy to let you watch or try a class first, so reach out before you commit.

See their beginner class info

Your first taekwondo class at S Martial Arts

Nervous about walking into a taekwondo school for the first time? Almost everyone is, and good instructors expect beginners to come through the door. Here's what to know. What to expect: a typical first class is a warm-up, then drilling basic stances, blocks, and kicks with a partner or on pads — not hard sparring. Rest whenever you need to; no one will bat an eye. What to wear: loose athletic wear you can move in (or a dobok if you have one); you'll train barefoot on the floor. What to bring: water and a positive attitude — many schools lend a loaner dobok for a first class, so it's worth asking when you call. As you keep training you'll get your own dobok and belt, and sparring gear (mouthguard, headgear, and guards) once you begin sparring. Sparring eases in gradually, once your fundamentals and forms are solid. Arrive 10–15 minutes early to sign a waiver and meet the instructor. It gets easier fast — most people feel far more at home by their third class.

Taekwondo is a martial art and a contact sport. Ease in, listen to your instructors, and if you have any injuries or health concerns, mention them before class and check with a doctor if you're unsure.

Where to find S Martial Arts

1941 E 4th St, Ontario, CA91764

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Listing verified July 2026 from public business records and student reviews. Something out of date? Report a correction. Own this school? Claim your listing — it's free.