King Beds Online

Find king beds online at Mattress Firm to explore a range of styles, sizes and price points for your bedroom. Whether you’re creating a relaxing retreat or updating your sleep space, shopping online makes it easy to compare king beds and find an option that fits your needs. We make sleep easy™ with convenient online shopping and support from Sleep Experts®.

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Sleepy's Basic Innerspring Firm Mattress

8676

Starting at

$249⁹⁹

Firm Comfort, best for

Back, Stomach Sleepers
Temperature
Pain
Bed Partner
Allergies
Toss and Turn

Sleepy's Basic Adjustable Base

Starting at

$299⁹⁹

FREE with select mattress purchase³.

Sleepy's Basic Memory Foam Firm Mattress

3213

Starting at

$299⁷⁷

$999⁹⁹

$700 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn
Support

Sleepy's Signature Platform Frame

Starting at

$189⁹⁹

Sleepy's Rest Medium Innerspring Mattress

7001

Starting at

$344⁰⁰

$1249⁹⁹

$906 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

Sleepy's Rest Firm 2.0 Innerspring Mattress

7001

Starting at

$449⁹⁹

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

Sleepy's Deluxe Adjustable Base

Starting at

$1399⁹⁹

Save $299 with qualifying mattress purchase. Code: ELEVATE

Tempur-Pedic TEMPUR-Ergo ProSmart Adjustable Base

Starting at

$3199⁰⁰

$3399⁰⁰

$200 OFF

Calm app 3-month free trial with mattress purchase & registration

Tempur-Pedic TEMPUR-Adapt 11" Medium Previous Generation Mattress

3631

Starting at

$2029⁷⁷

$2899⁰⁰

$869 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Pain
Temperature
Allergies
Bed Partner
Toss and Turn

Beautyrest BR800 13.5" Plush Pillow Top Mattress

2784

Starting at

$819⁹⁹

$1499⁹⁹

$680 OFF

Plush Comfort, best for

Side Sleepers
Toss and Turn
Pain
Bed Partner
Temperature

FREE ADJUSTABLE BASE ³ with code ELEVATE

Tempur-Pedic TEMPUR-Ergo Smart Adjustable Base

986

Starting at

$2699⁰⁰

$2899⁰⁰

$200 OFF

Calm app 3-month free trial with mattress purchase & registration

Beautyrest Silver BRS900 11.75" Extra Firm Mattress

3296

Starting at

$709⁹⁹

$1699⁹⁹

$990 OFF

Extra Firm Comfort, best for

Back, Stomach Sleepers
Temperature
Pain
Allergies
Bed Partner
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest BR800 11.25" Firm Mattress

2233

Starting at

$619⁹⁹

$1299⁹⁹

$680 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Toss and Turn
Pain
Bed Partner
Temperature

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sealy Essentials Sudley 8.5" Firm Mattress

989

Starting at

$499⁹⁹

$999⁹⁹

$500 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Temperature
Bed Partner
Toss and Turn

Tulo Bamboo 10" Medium Green Tea Memory Foam Mattress

5555

Starting at

$379⁹⁹

$889⁹⁹

$510 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Pain
Bed Partner
Temperature
Allergies
Toss and Turn

Tulo Bamboo 12" Medium Plush Green Tea Memory Foam Mattress

5555

Starting at

$429⁹⁹

$1019⁹⁹

$590 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Bed Partner
Pain
Temperature
Toss and Turn

Beautyrest BR800 13.5" Medium Pillow Top Mattress

1863

Starting at

$819⁹⁹

$1499⁹⁹

$680 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Toss and Turn
Pain
Bed Partner
Temperature

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest Silver BRS900-C 13.75" Extra Firm Mattress

1810

Starting at

$859⁹⁹

$1999⁹⁹

$1140 OFF

Extra Firm Comfort, best for

Back, Stomach Sleepers
Temperature
Pain
Bed Partner
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Tulo Bamboo 8" Medium Green Tea Memory Foam Mattress

5555

Starting at

$329⁹⁹

$809⁹⁹

$480 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

Beautyrest Silver BRS900 11.75" Medium Firm Mattress

1745

Starting at

$809⁹⁹

$1099⁹⁹

$290 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Allergies
Bed Partner
Temperature
Pain
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Purple Original Mattress

59743

Starting at

$1760⁰⁰

$2199⁰⁰

$439 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Temperature
Pain
Bed Partner
Toss and Turn
Allergies

Sleepy's By Sealy Slumber Cushion Firm Mattress

301

Starting at

$1999⁹⁹

Medium Comfort, best for

Back, Side, Stomach Sleepers
Bed Partner
Toss and Turn
Pain
Temperature

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sealy Essentials Winter Green 13" Plush Euro Pillow Top Mattress

548

Starting at

$779⁹⁹

$1459⁹⁹

$680 OFF

Plush Comfort, best for

Side Sleepers
Bed Partner
Pain
Temperature
Toss and Turn
Allergies

Beautyrest BR800 12" Plush Euro Top Mattress

735

Starting at

$569⁹⁹

$1399⁹⁹

$830 OFF

Plush Comfort, best for

Side Sleepers
Toss and Turn
Pain
Bed Partner
Temperature

Sleepy's By Sealy Slumber Medium Mattress

175

Starting at

$709⁹⁹

$2299⁹⁹

$1590 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Bed Partner
Toss and Turn
Pain
Temperature

FREE ADJUSTABLE BASE ³ with code ELEVATE

Hollywood Enforce Platform Frame

304

Starting at

$399⁹⁹

Shopping for king beds online makes it easier to compare mattress comfort, bed frames, adjustable bases and bedroom essentials from the comfort of home. A standard king mattress measures approximately 76 inches wide by 80 inches long, offering generous space for couples, families and anyone who prefers extra room to stretch out. Explore a range of king size mattresses, including memory foam, innerspring, hybrid and TEMPUR-Material™ options, to find the right balance of support, pressure relief and temperature comfort. You can also shop king bed frames, platform beds, upholstered beds and storage beds in styles that complement your bedroom while providing a stable foundation for your mattress. The best king bed for your space depends on your sleep preferences, bedroom size and preferred features. Consider your firmness preference, sleeping position and mattress materials before choosing a king mattress, then complete your setup with pillows, sheets, mattress protectors and a supportive bed base. Shopping online through Mattress Firm gives you convenient access to trusted mattress brands, helpful product details and guidance from Sleep Experts® so you can make a confident choice. From affordable king beds for a master bedroom refresh to premium sleep systems designed for personalized comfort, the right setup can help you get better zzz's and live well.

What types of king beds can I shop for online? + -

You can explore a variety of king beds online, including upholstered beds, platform beds, panel beds, storage beds and adjustable-compatible frames. Compare materials, colors, finishes and design details to find a bed that suits your bedroom.

How do I choose a king bed style for my bedroom? + -

Consider your bedroom decor, preferred materials and desired features. Upholstered beds add a soft, inviting look, while wood and metal beds create a classic or modern feel. Storage beds can also help keep your space organized.

What materials are commonly used for king beds? + -

King beds are commonly made with wood, metal, engineered wood and upholstered materials such as linen or woven fabric. Each option offers a distinct look, so consider the finish, texture and overall style you want in your bedroom.

Can I find king beds with built-in storage? + -

Yes, many king beds include built-in drawers or lift-up storage compartments. These designs provide a convenient place to organize bedding, clothing and other bedroom essentials while keeping them out of sight.

How can I shop for king beds online at Mattress Firm? + -

Browse king beds online by style, material, color and features. Review product details and images to compare options, then choose a bed that complements your bedroom and supports your preferred sleep setup.