Mattress Firm McKnight South at Siebert Crossing — Bed & Mattress Store Pittsburgh PA
Franchise Owned Clearance Center New & Clearance Showroom 4868 McKnight Rd Pittsburgh, PA, 15237
10:00am- 9:00pm
10:00am- 7:00pm

This store accepts donations

How do we stack up?

Mattress Firm LogoGallery Furniture LogoRooms To Go LogoMattress 1 Logo

# of Houston Locations

Over 100 Houston Locations

3 Houston Locations

4 Houston Locations

100 Houston Locations

Comfort Guarantee

120 Night Sleep Happy Guarantee

90 Days

48 Hours after Delivery

180 Days

Mattress Selection






Offer 3 ways to get it delivered to give you choice, convenience and satisfaction. Order before 3pm and get it delivered SAME DAY. 3 Hour Delivery Window.

Same day within 100 miles of Houston location. 6 Hour Delivery Window.

$49.99 Delivery

Free Delivery


Mattress Firm Logo
  • # of Houston Locations: Over 100 Houston Locations
  • Comfort Guarantee: 120 Night Sleep Happy Guarantee
  • Mattress Selection: 108
  • Delivery: Offer 3 ways to get it delivered to give you choice, convenience and satisfaction. Order before 3pm and get it delivered SAME DAY. 3 Hour Delivery Window.
Gallery Furniture Logo
  • # of Houston Locations: 3 Houston Locations
  • Comfort Guarantee: 90 Days
  • Mattress Selection: 27
  • Delivery: Same day within 100 miles of Houston location. 6 Hour Delivery Window.
Rooms To Go Logo
  • # of Houston Locations: 4 Houston Locations
  • Comfort Guarantee: 48 Hours after Delivery
  • Mattress Selection: 56
  • Delivery: $49.99 Delivery
Mattress 1 Logo
  • # of Houston Locations: 100 Houston Locations
  • Comfort Guarantee: 180 Days
  • Mattress Selection: 63
  • Delivery: Free Delivery

Mattress Firm McKnight South at Siebert Crossing | Beds & Mattresses Store Pittsburgh PA 15237


At Mattress Firm’s locations in Pittsburgh, PA, you won’t believe how far your budget stretches.

As America’s favorite neighborhood mattress store, we started as a handful of mattress stores more than 30 years ago in Houston and have since evolved into the nation’s largest mattress retailer. No matter what your sleep style is, we’ll always have your back, side and stomach, and we won’t rest easy until you do.


We constantly refine our selection to fit everyone’s specific sleep needs, matching millions of people with the perfect mattresses that perfectly fit their budgets. Whether you’re dealing with snoring or backaches, have trouble falling asleep regularly or the time has simply come to replace your old mattress, we’re here to help. Everybody and every body is different. So, at Mattress Firm locations in Pittsburgh, PA, we carry a variety of brands and construction types, ranging from traditional innerspring to hi-tech hybrids and memory foam from brands you love, like Sleepy’s, tulo, Beautyrest, Serta and more.


120 Night Sleep Trial

We’re so confident we’ll match you with the right mattress, you can take it home and sleep on it for 120 nights. If it’s not the perfect fit, we’ll happily pick it up and pair you with a new one.

120 Night Low Price Guarantee

We’re making a promise to help you sleep easier. We’ll beat any price on comparable mattresses, even ones you buy from us, for up to 120 nights. Just show us, and we’ll refund you.

A Convenient Delivery

We have delivery options that fit your schedule. We offer same-day delivery on some orders, which rolls out the red carpet upon arrival. Or maybe you’d like the simplest shipping method—our bed in a box options—that literally bring your mattress to your doorstep. We have something that conveniently fits your schedule.

Mattress Firm McKnight South at Siebert Crossing is rated 4.8 out of 5 by 80.
Rated 5 out of 5 by from Amazing amazing man Bill was absolutely fantastic! I bought a mattresss from mattress firm. The outlet brought me a used stained mattress, nothing at all to do with bill or anything bill did, all due too actual mattress firm company. After the company caused the issue, bill went completly out of his way to accommodate me and took money out of his own pocket to give me a discounted box spring, mattress protector, replaced the mattress they gave me with an even better mattress and reimbursed the delivery fee. I would highly recommend bill as your sales person. He is extremely kind, empathetic, charismatic and excellent at what he does. I could not speak more kindly of any sales man I’ve met.
Date published: 2018-11-04
Rated 5 out of 5 by from Great to deal with, great warranty & return policy They offer a huge selection of Simmons Beautyrest mattresses. Bright, clean showroom and restroom. Knowledgeable, courteous and professional sales people. Professional & courteous delivery guys. They have a great warranty, a generous return policy and interest free financing, making me 100% comfortable buying from them. The mattress looks great - just what I expected. I'll be back later to review the actual mattress - haven't slept on it yet. Though I was shopping for a Beautyrest, I ended up buying a Hampton & Rhodes Grand Harbor plush pillowtop because it felt right for me. Totally awesome experience with purchase and delivery at the McKnight Store. So glad I stopped!
Date published: 2018-01-28
Rated 2 out of 5 by from Mattress was not bad, Don't order sheets Recently bought a king sized mattress. Mattress was fine, think I got a pretty good deal. However, I also bought sheets with the mattress and it's been a complete disaster. They sent me the wrong sheets, I ordered king size level 3 and received a queen size level 1. Obviously I cannot use queen sheets on a king bed. I called to try to get this fixed and nobody has a clue what's going on. They were $150 sheets, they said I can't take them back because they're from a third party vendor. I have to contact the vendor but nobody answers at the number I was given for them. Nobody at the store will help past telling me to contact the vendor. It's been a week and I still haven't heard back from them. I'm extremely disappointed with the service I've received since this happened, really soured me on Mattress Firm. The money I wasted on the sheets eliminates any deal I got on the mattress.
Date published: 2016-08-26
Rated 5 out of 5 by from Easiest big item purchase I've ever had Saturday afternoon my wife and I stopped in to our local MattressFirm. Daniel and Roger were polite, professional, and informative. They answered our questions and gave us exactly what we asked for at a great price. They explained their policies clearly. Delivery was scheduled and we were out the door! Delivery was made on time, with notification prior to arrival. The guys were super polite and eager. They brought in the new, took out the old. The transaction was efficient and smooth and painless. I could not have asked for better service!
Date published: 2018-06-07
Rated 5 out of 5 by from Don't put it off! My husband and I waited to purchase a mattress because we thought for sure it would be a long and arduous process. We went to Mattress Firm and were amazed at how easily the whole thing went. The staff was very knowledgeable, which made choosing a mattress easy. The delivery truck, which kept us abreast of its schedule, arrived the next day and moved in the new mattress without a hitch (and took away the old one!). The whole experience was stress-free and pleasant, and we love our new bed. We really recommend Mattress Firm. Talk to Kurt!
Date published: 2017-11-14
Rated 4 out of 5 by from In store experience > delivery experience The store had knowledgeable, helpful, friendly and flexible staff. Bed was not in-stock, so it needed to be ordered but this process was relatively painless. The pair of delivery men had trouble lifting the adjustable stand up our single flight of stairs to our bedroom, letting it slip multiple times during transport resulting in multiple scuff marks on the wall and a small dent in the drywall which they did not even notice - or noticed and chose not to inform us.
Date published: 2019-08-13
Rated 5 out of 5 by from Excellent service, sleeping great! Dave was extremely knowledgeable, and we are so glad we chose Mattress Firm Pittsburgh North. He did not try to sell us a bed that we could not afford, but also did not allow for us to simply buy the first thing we tried out. He listened to our concerns and put us on the best option for our needs. His assistant manager, Nicole, was also there, and was extremely friendly and knowledgeable. All in all a great store, and a great experience!
Date published: 2016-09-08
Rated 5 out of 5 by from Great service and excellent timing! Mattress Firm on the corner of Siebert Rd and Mcknight is a wonderful store. The employees there were excellent at listening to our needs and giving us space while we were looking around and trying the mattresses out. We ended up getting an amazing deal since it was time for new models to come in. I would definitely recommend using Mattress Firm and going around March in case that is the month of new models.
Date published: 2016-03-21
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