Best King Size Mattresses of 2026

Find more room to rest with the best king size mattresses, ranked by customer review ratings to help you compare with confidence. Whether you’re sharing your bed or simply want extra space to stretch out, explore customer favorites to find the comfort and support that suit your sleep style

What to look for in king size mattresses

Finding the best king size mattress starts with choosing the right fit for your room, sleep position and comfort preferences

1. Size And Room Fit

A standard king mattress measures 76 inches wide by 80 inches long, offering plenty of space to stretch out. Measure your bedroom, doorways and bed frame to confirm the fit while leaving room to move around the bed.

2. Comfort And Support

Side sleepers often prefer cushioning around the shoulders and hips, while back and stomach sleepers may benefit from a firmer feel. Look for a mattress that balances pressure relief with support to help keep your spine aligned.

3. Materials And Temperature

Memory foam contours to your body, while innerspring and hybrid mattresses typically offer a more responsive feel. If you tend to sleep warm, consider breathable covers and materials designed to help manage heat.

4. Motion Isolation And Edge Support

If you share your king mattress, motion isolation can help limit disturbances when your partner changes positions. Strong edge support can also make the perimeter feel steadier when you sit or sleep near the side.

Beautyrest Black Hybrid Series Two 14.5" Medium Apex Top Mattress

A black medium comfort mattress with advanced cooling, pressure relief, and motion separation technology.

Medium Comfort, best for

Pain
Bed Partner
Temperature
Toss and Turn

Starting at

$4399⁰⁰

$300 ⁶ adjustable base instant gift with purchase.

Beautyrest Black Hybrid Series Three 14.5" Firm Mattress

A black firm mattress with Triple Stranded Pocketed Coil Technology and cool-to-touch Sleep Climate Surface.

105

Firm Comfort, best for

Pain
Bed Partner
Temperature
Toss and Turn

Starting at

$4699⁰⁰

$300 ⁶ adjustable base instant gift with purchase.

Beautyrest Black Hybrid Series Three 15" Medium Mattress

A black medium mattress with cooling memory foam and pocketed coil technology for individualized support.

161

Medium Comfort, best for

Pain
Bed Partner
Temperature
Toss and Turn

Starting at

$5199⁰⁰

$300 ⁶ adjustable base instant gift with purchase.

Sealy Essentials Spruce 5.5" Firm Mattress

A king-sized firm mattress with SealySupportTM Gel Foam and a soft knit fabric cover.

1373

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Temperature
Bed Partner
Toss and Turn

Starting at

$949⁹⁹

Sealy Posturepedic Ashurst II 13" Soft Mattress

A plush 13" soft mattress with PrecisionFit Coils and SealyComfort Gel Foam for enhanced support.

Plush Comfort, best for

Side Sleepers
Pain
Allergies
Bed Partner
Toss and Turn

Starting at

$1299⁰⁰

$1799⁰⁰

$500 OFF

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sealy Posturepedic Elite Brenham II 15" Medium Mattress

A medium king mattress with cooling gel memory foam and PrecisionFit Coils for targeted support.

540

Medium Comfort, best for

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

Starting at

$2599⁰⁰

Receive $200 Instant Gift⁴ with purchase.

Stearns & Foster Estate 14.5" Firm Mattress

A luxurious, firm king-size mattress with motion separation, pressure relief, and a cool-to-the-touch cover.

1857

Firm Comfort, best for

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

Starting at

$3099⁰⁰

Receive $300 Instant Gift⁴ with purchase.

Sealy Posturepedic Ashurst II 13" Medium Mattress

A 13" medium mattress with PrecisionFit Coils and SealyComfort Gel Foam for optimal support and comfort.

687

Medium Comfort, best for

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

Starting at

$2399⁰⁰

FREE ADJUSTABLE BASE ³ with code ELEVATE

Tempur-Pedic TEMPUR-ProAdapt 12" Medium Previous Generation Mattress

A 12" medium firm king mattress with pressure relief, motion separation, and cooling technology.

6639

Medium Comfort, best for

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

Starting at

$2869⁷⁷

$4099⁰⁰

$1229 OFF

Stearns & Foster Reserve Duet 17" Firm Euro Pillow Top Mattress

A cool to the touch, firm Euro pillow top mattress with motion separation and pressure relief.

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

Starting at

$7199⁰⁰

Receive $300 Instant Gift⁴ with purchase.

What types of king mattresses can I choose from? + -

Common options include memory foam, innerspring, hybrid and latex mattresses. Memory foam typically has a contouring feel, innerspring mattresses have a more buoyant feel, hybrids combine coils with comfort layers and latex has a responsive feel.

How do I choose the right firmness for a king mattress? + -

Start with whether you prefer a plush, balanced or firm feel, then compare mattresses while lying in your usual sleeping position. Firmness labels can vary by brand, so use them as a starting point rather than an exact standard.

What is the difference between pillow top and tight top king mattresses? + -

A pillow top mattress has a distinct cushioning layer sewn onto its surface, while a tight top has a flatter profile without that separate layer. Either style can come in a range of firmness levels, so the top design alone does not determine the overall feel.

What type of base works with a king mattress? + -

Depending on its construction, a king mattress may work with a platform bed, a compatible foundation or an adjustable base. Check the mattress manufacturer's requirements for center support, slat spacing and adjustable base compatibility before choosing a base.

How should I care for a king mattress? + -

Use a mattress protector and follow the manufacturer's cleaning and rotation instructions. Many modern mattresses are designed for use on one side, so do not flip yours unless the care instructions recommend it.