Best King Mattress For Side Sleepers of 2026

Finding the best king mattress for side sleepers starts with choosing supportive comfort that cushions the shoulders and hips while helping keep the spine aligned. To make your search easier, this list features highly rated king mattresses ranked by user review ratings, with options for different comfort preferences, sleep needs and budgets. Explore the top picks to find a comfortable mattress that can help you get better zzz's night after night.

What to look for in a king mattress for side sleepers

The best king mattress for side sleepers can help provide the pressure relief, support and space you need for comfortable sleep.

1. Pressure Relief

Side sleepers often place more pressure on their shoulders and hips. Look for comfort layers made with responsive foam or other cushioning materials that contour to your body without making you feel stuck.

2. Medium Firm Feel

A medium or medium-soft mattress may offer a comfortable balance of cushioning and support for many side sleepers. Your ideal firmness depends on your body type, preferred sleep position and comfort preferences.

3. Targeted Support

A supportive mattress can help promote a comfortable sleep posture by keeping your body properly aligned. Zoned support systems or reinforced edges may provide additional support where you need it most.

4. Space And Motion Isolation

A king mattress gives couples more room to stretch out and change positions. If you share the bed, consider a mattress with good motion isolation to help minimize sleep disturbances when your partner moves.

Beautyrest PressureSmart 2.0 Plush 11.75" Mattress

A breathable, plush king-sized mattress with targeted pressure relief and adjustable base compatibility.

6252

Plush Comfort, best for

Side Sleepers
Temperature
Bed Partner
Pain
Toss and Turn

Starting at

$1150⁰⁰

$2299⁹⁹

$1150 OFF

FREE ADJUSTABLE BASE ³ with code ELEVATE

Purple Original Mattress

A medium firm king mattress with motion separation, pressure relief, and breathable features for a comfortable sleep.

59759

Medium Comfort, best for

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

Starting at

$1760⁰⁰

$2199⁰⁰

$439 OFF

Beautyrest BR800 12" Plush Euro Top Mattress

A plush euro top king mattress with Beautyrest Pocketed Coil springs and Gel Memory Foam Lumbar Support.

745

Plush Comfort, best for

Side Sleepers
Toss and Turn
Pain
Bed Partner
Temperature

Starting at

$569⁹⁹

$1399⁹⁹

$830 OFF

Beautyrest Silver BRS900 12" Plush Mattress

A plush king mattress with 900 Series Beautyrest Pocketed Coil Technology for flexible support and cool comfort.

1149

Plush Comfort, best for

Side Sleepers
Temperature
Pain
Bed Partner
Toss and Turn

Starting at

$729⁹⁹

$1699⁹⁹

$970 OFF

FREE ADJUSTABLE BASE ³ with code ELEVATE

Nectar Premier 13" Medium Memory Foam Mattress

A medium-firm king-sized memory foam mattress with enhanced cooling and pressure relief for restful sleep.

510

Medium Comfort, best for

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

Starting at

$1099⁰⁰

$1799⁰⁰

$700 OFF

Purple Restore 11.5" Soft Hybrid Mattress

A plush hybrid mattress with GelFlex Grid for pressure relief and coil core for full body support.

1666

Plush Comfort, best for

Side Sleepers
Pain
Allergies
Bed Partner
Toss and Turn
Temperature

Starting at

$2700⁰⁰

$3399⁰⁰

$699 OFF

Beautyrest Silver BRS900-C 14.5" Medium Mattress

A breathable silver king mattress with medium firmness, pressure relief, and adjustable base compatibility.

797

Medium Comfort, best for

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

Starting at

$859⁹⁹

$1999⁹⁹

$1140 OFF

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sealy Essentials Autumn Ash 10.5" Plush Mattress

A plush king-size mattress with SealyCool Gel Foam for breathable comfort and conforming support.

Plush Comfort, best for

Side Sleepers
Pain
Temperature
Bed Partner
Toss and Turn
Allergies

Starting at

$568⁹⁹

$1049⁹⁹

$481 OFF

Sleepy's By Sealy Skye Hybrid Mattress

A medium comfort hybrid mattress with gel memory foam, breathable stretch knit cover, and reduced motion transfer.

2371

Medium Comfort, best for

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

Starting at

$699⁹⁹

$999⁹⁹

$300 OFF

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sleepy's By Sealy Slumber Medium Mattress

A breathable, motion-separating, medium comfort mattress with gel foam layers and individually wrapped coils for pressure relief and spinal alignment.

180

Medium Comfort, best for

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

Starting at

$709⁹⁹

$2299⁹⁹

$1590 OFF

FREE ADJUSTABLE BASE ³ with code ELEVATE

What mattress firmness is best for side sleepers? + -

Side sleepers often prefer a medium to medium-soft feel that cushions the shoulders and hips while still providing balanced support. The best choice depends on your body type, comfort preferences and sleep position.

What mattress materials are best for side sleepers? + -

Memory foam and hybrid mattresses are popular choices for side sleepers because they can provide contouring comfort around the shoulders and hips. Latex may also be a good option if you prefer a more responsive feel.

How can side sleepers choose a mattress with pressure-relieving comfort? + -

Look for a mattress with comfort layers that gently contour to the body, especially around the shoulders and hips. A responsive support system can help maintain a comfortable, aligned sleep surface.

Are hybrid mattresses a good choice for side sleepers? + -

Hybrid mattresses combine comfort layers such as foam or latex with an innerspring support system. This design can offer a balance of contouring comfort, responsiveness and support for side sleepers.

What should side sleepers look for in a mattress? + -

Focus on the mattress feel, comfort materials and support system. Side sleepers may want cushioning around the shoulders and hips, a supportive core and a surface that helps them feel comfortably aligned throughout the night.