Mattress Firm Green Mount Road logo

Mattress Firm Green Mount Road

Mattress Firm

O'Fallon, IL

4.8(547 reviews)
9 active offers6 store perks
DLX Mattress advertisement. Buy direct from the mattress maker and save $500.

Advertisement

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

See all reviews

Average rating 4.8 · 547 reviews

Last updated Sep 18, 2026

Mackie Gee· 4★ · 2026-07-18T21:41:29.418144092Z

Sleep expert was friendly and helpful yet moved very hastily when I came down to the transaction. Typically it wouldn’t be a big deal to me but being that I was the only customer in the store, I’m not sure what the big rush was about. I felt slightly pressured to make purchase quicker than I could fully comprehend and process it because everything was happening so fast.

View on Google
AK· 5★ · 2026-05-05T18:07:52.539214716Z

David was very knowledgeable, professional, and kind. He was more than happy to guide us through all of the options around our needs to help us make a good informed decision on which mattress we should choose. We came to a decision at our own pace without feeling any pressure. It was a refreshing and positive experience overall. Highly recommended!

View on Google
Candace Jefferson· 2★ · 2026-07-13T18:15:44.897738483Z

Upon arrival to an empty store I greeted the two salesman sitting behind the desk first. One didn't even look up. At first I felt unwelcomed as I too am in Hospitality senior management for over 15 years. The 10 to 5 rule is pretty standard in the service industry, and they fell very short of that. Steve did attempt to turn the situation around and took care of my sale. I almost left because I can spend over 2K anywhere in that area, and probably could have gotten the mattress I purchased at a lower price. The rest of the process was relatively smooth minus an issue with my bank hold for the amount I purchased it for. I am looking forward to the arrival of my new mattress and I hope my interaction will serve as a profound reason not to judge a book by it's cover.

View on Google
Jamie Links· 5★ · 2026-05-22T19:30:16.017382573Z

We came in today knowing we wanted a Tempur-pedic, but no idea which one. David made the whole process less stressful, he is very knowledgeable and directed us to the right one! This experience had us leaving happy. Definitely telling our friends to go see David at Mattress Firm!

View on Google
Brandon Barnes· 5★ · 2026-09-07T02:34:36.322914201Z

I came in after I'd done some research online. I was in and out with a new mattress to be delivered in little time. Not to say the floor people didn't do their job, their expertise helped to provide an informed decision.

View on Google
More Mattress Firm locations
Other mattress stores near O'Fallon

See all mattress stores in O'Fallon, IL