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Mattress Firm Knox Park

Mattress Firm

Dallas, TX

4.9(637 reviews)
5 active offers6 store perks
About Mattress Firm

Mattress Firm offers a wide selection of mattresses from top brands, including Tempur-Pedic, Purple, Sealy, and Sleepy's. They provide various promotions, such as the Memorial Day Sale with up to 60% off, and offer financing options like 0% interest with equal monthly payments on qualifying purchases. Customers can enjoy free and fast delivery, a low price guarantee, and a 120-night sleep trial. All mattresses are assembled in the U.S.

Current Promotions
Last updated Jul 27, 2026
  • 72 Hour Sale: Up to 60% off select mattresses.Expires: Monday
  • $300 Instant Gift toward a total sleep solution.
  • $300 Instant Gift with select adjustable bases.
  • Sleepy’s by Sealy Skye Hybrid Mattress + Adjustable Base.
  • Get any size for one price on select mattresses starting at $219.99.
Purchase Incentives
  • 0% interest with 72 equal monthly payments on qualifying purchases.
  • Free & Fast Delivery.
  • Free & Fast Delivery
  • Financing & Leasing
  • Low Price Guarantee
  • 120 Night Sleep Trial
Mattress Selection

Brands

Tempur-Pedic
Purple
Sealy
Sleepy's

Ideal for

teens
growing children
adults

Technology

memory foam
hybrid
innerspring

Assortment

Box Springs & Frames
Adjustable Bed Bases
Bedding
Furniture & More

Price range

$
$$
$$$
$$$$

Estimated price positioning for this store

What Your Neighbors Say

Real Google reviews from nearby shoppers

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Average rating 4.9 · 637 reviews

Last updated Jul 13, 2026

Josh C· 5 · 2026-06-10T16:40:42.891921006Z

Daniel was fantastic to work with and a true expert when it comes to finding the right mattress. He took the time to understand exactly what I was looking for and helped me find the perfect replacement. The entire experience was smooth, professional, and stress-free. Outstanding customer service from start to finish. I highly recommend working with Daniel and visiting this location for your next mattress purchase!

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Andy H· 5 · 2026-06-12T21:46:57.716653599Z

Daniel Le is genuinely interested in making sure his customers have the chance to experience better sleep. How do I know? Because that's what happened for me and my wife. He showed me how new technology can target our separate sleep difficulties, and it's like going from driving a janky moped to riding in a chauffeured Rolls...

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david sasdi· 5 · 2026-05-23T23:54:35.979967217Z

One doesn't buy a mattress very often, so when you do, the experience is typically very memorable- for good or bad. Based on that, I my highest recommendation is that when you do buy one, you do it at the Knox Park Mattress Firm. Huge compliments to Senior Store Manager Moni Simmaphilavong for a terrific, customer-focused experience. Moni was engaged, responsive, helpful, and when we hit a few bumps with the technology in locking in delivery and financing, she patiently walked us through every step and made it easy and successful. Definitely a 5-star experience due to Moni's efforts!

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Sophia Tran· 5 · 2026-05-29T23:46:27.818604193Z

I didn’t think bed quality mattered much to me until conversing with Daniel Le. His knowledge and insight convinced me to invest in my sleep health. I appreciate Daniel’s professionalism and how he didn’t make me feel naive throughout the buying process. I mentioned that my bed purchases are typically at the same place I buy bulked goods because I typically shop price over alleged quality when it comes to mattresses. Daniel convinced me that the investment is worth the quality of sleep as he broke down the long-term benefits associated with the costs. Thank you, Daniel. I will be recommending friends and family to come see you!

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M haimeiyou· 1 · 2026-05-29T20:40:34.715891856Z

The store is great and the sales people great--I only have good things to say about them. My problem is with the product. I first purchased the Tempur-Proadapt but that softened after a few months so they took it back on their 120day guarantee. I then got the Beautyrest Preasuresmart and have had it about a year but it has gone soft. The warranty claim was rejected on grounds that this is normal for the mattress. But then what is the point of a firm mattress if it becomes an overly soft one in a year?

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