Mattress Firm Grand Plaza — Bed & Mattress Store San Marcos CA
Franchise Owned Clearance Center New & Clearance Showroom 109 S Las Posas Rd Ste 101San Marcos, CA, 92078
10:00am- 8:00pm
11:00am- 6:00pm

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 Grand Plaza | Beds & Mattresses Store San Marcos CA 92078


At Mattress Firm’s locations in San Marcos, CA, 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 San Marcos, CA, 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 Grand Plaza is rated 5.0 out of 5 by 24.
Rated 5 out of 5 by from First new mattress in over 20 years It's been over 20 years since we bought a new mattress and my wife I said that after the first of year we were going to get a new one. Well it's 1/1/16 and I tired of not having a good night sleep, always tossing and turning; so we head on over to San Marcos where a lot of furniture stores are to do a little research. I say lets go to Sleep Trian first and Joe greeted us and got us up to speed on what the options were and had us lay on some so we could judge we we liked. We finally decided and told him we wanted to look at some other stores before we bought, Joe went on to tell us what the benifits were from buying from Sleep Train and we were sold on the spot because customer satisfaction is #1 we us!
Date published: 2016-01-03
Rated 5 out of 5 by from Superb Customer Service! Mattress Firm is the best Company! Mattress Firm’s exchange policy is truely committed to customer satisfaction! I purchased both a Beautyrest Black Hybrid Plus Alcove Mattress and an adjustable base. I have never experienced a kinder more understanding and professional Salesman as TOM from the San Marcos, CA store on Grand Avenue. HE WAS SO HONEST AND DOWN TO EARTH, not pushy and so helpful. Having a bad back makes it hard sometimes to find the right combination of mattress unless you try it out first for a short period of time. Their exchange policy is phenomenal! Tom was so committed in finding the best balanced combination for me, and was an encyclopedia of knowledge. I think Tom is an exemplary employee for Mattress Firm, and I am sure they are very proud to have him! JOANNE B.
Date published: 2018-06-03
Rated 5 out of 5 by from ZZZZZZZZZZ :-) Matt was awesome. He really took the time to understand our sleeping habits and what we were looking for. He pointed out the features, pro and con and let us make up our own mind with no pressure. He answered all our questions and even listened to my husband ramble on without loosing his professionalism or his sense of humor. Our mattress will be delivered soon and I'm sure we will be sleeping great.
Date published: 2016-04-08
Rated 5 out of 5 by from Helpfull and patient It typically takes me many weeks to make a big decision like a new bed. But when my I brought my husband to sleep train last week and met Matt, that changed. Without noticing, Matt easily took us through the difficult questions, helping to narrowed it down to two beds. We didn't expect to actually buy that day, but are grateful for the help, deciding on the wonderful medium Tempurpedic.
Date published: 2016-04-04
Rated 5 out of 5 by from Great Service Candace, our sales woman was very knowledgable about the diffirent mattresses Mattress Firm had to offer. She took her time in explaining the diffence in each mattress. She was the only Sales person in at the time but she handled her other customer and us with equal attention and we purchased 2 mattresses from her. I would definately recommend!
Date published: 2018-04-09
Rated 5 out of 5 by from Great Service I walked into sleep train that I know what I wanted or if I was really going to buy anything but Renée she help me out a lot she showed me all the different mattresses that mean they had and also all the Specials and deals they had four days later I came back from my mattress I'm very happy with the service and the experience
Date published: 2016-08-08
Rated 5 out of 5 by from Awesome service Great first time experience, Joe was very knowledgeable and kind. He took the time to work with us and listen. We don't feel like we got rob do to the fact there was no pressure on Joe behalf, he just wanted us to be a happy customer. ..which we are.
Date published: 2016-03-12
Rated 5 out of 5 by from Excellent service, advice and knowledge This is how service should be! Matt was very knowledgeable, but not pushy. He gave great advice and made sure we tested all options. Not often you find a sales person like this these days - kudos to Matt and Sleep Train.
Date published: 2016-05-23
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