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Mattress Firm OFallon

Mattress Firm

O'Fallon, MO

4.9(533 reviews)
9 active offers6 store perks
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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 Oct 23, 2026

Current homepage sales include up to $700 off, a free adjustable base with select mattresses, select price-point and bundle offers, clearance mattresses up to 70% off, $300 instant gifts, and an extra 15% off qualifying purchases.

  • Black Friday Sale: Save up to $700Expires: 2026-12-08Savings vary by product and model; valid only on models indicated; product selection may vary by store.
  • Free adjustable base with select mattressesSelect mattresses.
  • Queen beds under $500Queen beds.
  • Sleepy's By Sealy Spring Luna Euro Top mattress and adjustable base bundle
  • Any size for $249.99 on select mattressesSelect mattresses.
  • Up to 70% off select clearance mattressesSelect clearance mattresses; while supplies last.
  • $300 instant gift toward a total sleep solution
  • $300 instant gift on select Purple mattressesSelect Purple mattresses.
  • Get an extra 15% offQualifying purchase; available online or in-store.
Purchase Incentives
  • 0% interest with 72 equal monthly paymentsQualifying purchases with Mattress Firm credit card; subject to credit approval. For 60- and 72-month in-store purchases, taxes and delivery fees must be paid upfront.
  • Free and 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 · 533 reviews

Last updated Jul 1, 2026

Becky LeRoy· 5★ · 2026-05-24T01:04:46.944067538Z

Robert was AMAZING! I needed an adjustable bed base for my mattress and he knew exactly what to show me. He explained and showed me the benefits. No pressure at all. He also got me great price on it, before I even started talking a out price. I will suggest this Mattress Firm and Robert to anyone I hear of, looking for a mattress or adjustable bed. Thank you, Robert for making this purchase much easier than I thought it was going to be!

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Jamie· 5★ · 2025-11-26T23:41:35.389676171Z

Had an excellent experience today shopping with Brendan. I explained my specific needs and he very knowledgeably helped me make the perfect selection. I felt no high pressure sales techniques, just a genuine guy who wanted to help me make the best choice for my unique sleeping needs. The process was seamless and much faster than expected. 10/10 recommend

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Shelby Floyd· 5★ · 2026-04-19T02:12:34.958926910Z

Brendan was amazing! I could tell he genuinely cared about us getting the right mattress to ensure we got a good nights rest. It was an absolute treat to work with him. I haven’t seen customer service like that in a long time! Mattress Firm should be proud to have him! Thanks again Brendan!!

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Joe Rice· 5★ · 2025-01-14T12:15:43.196610Z

Rich was the first and going forward, the only Sleep Expert we will buy from for our Family mattress needs. We are comfortable sending our children to his O’Fallon, Missouri showroom on their own. Rich is honestly a very fair and trustworthy individual!! Our time was managed well by setting us up with beds to try as long as we needed to ensure our purchase was stellar. Rich was able to greet customers entering and still maintain focused on our needs at hand. The Rice Family will be repeat customers!!!

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Sam Wheeler· 5★ · 2026-05-14T23:31:50.835273142Z

We bought a bed today at the O’Fallon location. Bob was working the store and he was wonderful! He was super nice and helpful, he knew so much about the beds and quickly helped us find the perfect bed for our needs.

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