🏋️ Official Rankings
10 Best Gyms in Merrimack, NH (September 2026)
We compared 10 gyms serving Merrimack and Hillsborough County, New Hampshire, and ranked the top providers by verified reviews, ratings, and local reputation — 1,077 customer reviews in all.
The 10 listed below hold an average rating of 4.9 out of 5, led by Fuel Personal Training. Updated for September 2026.
- Gyms ranked
- 10
- Average rating
- 4.9★
- Reviews analyzed
- 1,077
- Area code
- 603
⭐ 5.0 · 102 reviews
25 S River Rd Ste 111, Bedford, NH 03110
⭐ 5.0 · 135 reviews
290 Derry Rd, Hudson, NH 03051
⭐ 5.0 · 90 reviews
150 Nashua Rd, Londonderry, NH 03053
⭐ 4.9 · 78 reviews
421 Daniel Webster Hwy, Merrimack, NH 03054
⭐ 4.8 · 305 reviews
515 Daniel Webster Hwy, Merrimack, NH 03054
⭐ 4.9 · 47 reviews
26 Columbia Cir B, Merrimack, NH 03054
⭐ 5.0 · 26 reviews
557 Daniel Webster Hwy Unit 3, Merrimack, NH 03054
⭐ 4.7 · 259 reviews
360 Daniel Webster Hwy Ste103, Merrimack, NH 03054
⭐ 5.0 · 18 reviews
290 Derry Rd, Hudson, NH 03051
⭐ 5.0 · 17 reviews
123 Nashua Rd #17, Londonderry, NH 03053
Gyms in Merrimack — FAQs
What is the best gym in Merrimack, NH?+
By verified reviews, highly rated fitness options serving Merrimack include Valid Fitness, IMPACT-X Performance, Your Goal Fitness, and Do Better. The best fit depends on whether you want general fitness, performance training, or coaching.
How do I pick the right gym in Merrimack?+
Think about what you'll actually use — weights, cardio, classes, or coaching — then compare local options on verified reviews and visit for a trial. Merrimack has performance-focused options like IMPACT-X Performance alongside general fitness gyms, so match the atmosphere to your goals.
Are there personal training options in Merrimack, NH?+
Yes — several Merrimack fitness businesses, including IMPACT-X Performance and Your Goal Fitness, focus on training and coaching rather than just open gym access. Ask each about trainer certifications and intro sessions.
What areas do Merrimack gyms serve?+
Merrimack is in Hillsborough County and uses the 603 area code with ZIP code 03054. Merrimack gyms draw members from across Hillsborough County and nearby Nashua and Bedford.
Gyms listed here serve Merrimack, Hillsborough County, and nearby ZIP codes including 03054.