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.

Serta Perfect Sleeper Nurture Night 13.5" Medium Mattress

A medium comfort king-sized mattress with pressure relief, lumbar gel support, and memory foam material.

1056

Medium Comfort, best for

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

Starting at

$1099⁰⁰

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.

544

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.

Purple Original Mattress

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

59801

Medium Comfort, best for

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

Starting at

$2199⁰⁰

Serta Perfect Sleeper Nurture Night 14.5" Pillow Top Mattress

A plush king-size mattress with breathable memory foam, adjustable base compatibility, and pressure relief.

1171

Plush Comfort, best for

Side Sleepers
Pain
Temperature
Bed Partner
Toss and Turn

Starting at

$1249⁰⁰

FREE ADJUSTABLE BASE ³ with code ELEVATE

Kingsdown Wesley 15.5" Medium Mattress

A medium-feel mattress featuring breathable plush and memory foam with reinforced edge support and advanced cooling technology.

Medium Comfort, best for

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

Starting at

$4199⁰⁰

$4799⁰⁰

$600 OFF

$300 ⁶ adjustable base instant gift with purchase.

Serta Perfect Sleeper Sleep Excellence Medium PillowTop Mattress

A breathable, pressure-relieving king-sized mattress with QuiltLoft Memory Foam and zoned support for ultimate comfort.

1463

Medium Comfort, best for

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

Starting at

$1449⁹⁹

$1999⁹⁹

$550 OFF

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sleepy's By Sealy Spring Medium Mattress

A king-size medium comfort mattress with Micro Lift technology for enhanced support and proper spinal alignment.

1498

Medium Comfort, best for

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

Starting at

$729⁹⁹

$1599⁹⁹

$870 OFF

FREE ADJUSTABLE BASE ³ with code ELEVATE

Kingsdown Crown Imperial 15" Plush Mattress

A plush king-size mattress with motion separation, pressure relief, and adjustable base compatibility.

Plush Comfort, best for

Side Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

Starting at

$4599⁰⁰

$5999⁰⁰

$1400 OFF

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sleepy's By Sealy Spring Plush Mattress

A plush king mattress with Micro Lift technology for enhanced support and proper spinal alignment.

858

Plush Comfort, best for

Side Sleepers
Pain
Bed Partner
Toss and Turn
Temperature

Starting at

$2049⁹⁹

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.