Best King Mattress For Side Sleepers of 2026

When it comes to finding the best king mattress for side sleepers, comfort and support are essential. Side sleepers often require a mattress that provides pressure relief for their hips and shoulders while maintaining proper spinal alignment. This curated list features top-rated king mattresses based on user reviews, ensuring that you can make an informed decision about your next investment in a good night's sleep. Whether you prefer memory foam, hybrid, or innerspring options, these mattresses have been praised by side sleepers for their ability to promote restful slumber and alleviate common pressure points.

What to look for in the best king mattress for side sleepers

Selecting the right mattress can significantly improve your sleep and overall health. Here are some key considerations when choosing a king mattress for side sleepers.

1. Firmness Level

Side sleepers typically need a medium to soft mattress that can contour to the curves of their body while providing adequate support. This helps reduce pressure on the shoulders and hips.

2. Material Type

Memory foam and latex mattresses are often recommended for side sleepers due to their ability to conform to the body's shape. They provide excellent pressure relief and distribute weight evenly.

3. Support

Look for a mattress that offers good support to maintain proper spinal alignment. This is crucial for side sleepers as they have more areas like shoulders and hips that can create pressure points.

4. Temperature Regulation

Some mattresses, especially memory foam ones, tend to retain heat which could cause discomfort during sleep. Look for mattresses with cooling technologies or breathable materials if you tend to sleep hot.

Beautyrest BR800 13.5" Plush Pillow Top Mattress

A plush king mattress with Beautyrest Pocketed Coil springs for personalized support and cooling technology.

2724

Plush Comfort, best for

Side Sleepers
Toss and Turn;Pain;Bed Partner;Temperature
Pain
Bed Partner

Starting at

$1500⁹⁹

FREE ADJUSTABLE BASE ³ with code ELEVATE

Serta Perfect Sleeper Elkins III 11" Plush Euro Top Mattress

A plush, king-sized mattress with pressure relief, cooling gel foam, and contouring support.

1610

Plush Comfort, best for

Side Sleepers
Pain;Temperature;Toss and Turn;Bed Partner
Temperature
Toss and Turn

Starting at

$1200⁹⁹

Serta Perfect Sleeper Nurture Night 13.5" Plush Mattress

A plush king-size mattress with lumbar gel support and Cool Twist Gel Memory Foam.

854

Plush Comfort, best for

Side Sleepers
Pain;Bed Partner;Temperature;Toss and Turn;Toss and Turn
Bed Partner
Temperature

Starting at

$1099⁰⁰

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sealy Essentials Winter Green 12" Plush Euro Top Mattress

A plush green king-sized Sealy mattress with pressure relief and reinforced edges for durability.

391

Plush Comfort, best for

Side Sleepers
Bed Partner;Pain;Temperature;Toss and Turn
Allergies
Temperature

Starting at

$1380⁹⁹

Tempur-Pedic TEMPUR-LuxeAdapt 2.0 13" Soft Mattress

A plush, king-sized mattress with advanced relief material for enhanced pressure relief and motion absorption.

1455

Plush Comfort, best for

Side Sleepers
Pain;Allergies;Bed Partner;Toss and Turn;Toss and Turn
Bed Partner
Temperature

Starting at

$5099⁰⁰

$5399⁰⁰

$300 OFF

Receive $300 Instant Gift⁴ with purchase + Calm app 3-month free trial

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
Temperature

Starting at

$1050⁹⁹

Tempur-Pedic TEMPUR-LuxeBreeze Soft 13" Mattress

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

1447

Plush Comfort, best for

Side Sleepers
Pain;Bed Partner;Temperature;Allergies;Toss and Turn;Toss and Turn
Pain
Bed Partner

Starting at

$6099⁰⁰

$6399⁰⁰

$300 OFF

Receive $300 Instant Gift⁴ with purchase + Calm app 3-month free trial

Stearns & Foster Estate 14.5" Plush Mattress

A luxurious plush mattress with TEMPUR Indulge Memory Foam and an exclusive innerspring system for pressure relief and cooling.

1022

Plush Comfort, best for

Side Sleepers
Pain;Bed Partner;Temperature;Allergies;Toss and Turn;Toss and Turn
Pain
Temperature

Starting at

$2699⁰⁰

$2999⁰⁰

$300 OFF

Receive $300 Instant Gift⁴ with purchase.

Sleepy's By Sealy Spring Plush Mattress

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

733

Plush Comfort, best for

Side Sleepers
Pain;Bed Partner;Toss and Turn;Temperature
Bed Partner
Toss and Turn

Starting at

$1450⁹⁹

$2050⁹⁹

$600 OFF

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sierra Sleep By Ashley Chime 12" Memory Foam Mattress

A plush memory foam mattress with pressure relief and motion isolation, ideal for side sleepers seeking comfort.

456

Plush Comfort, best for

Side Sleepers
Pain
Bed Partner
Toss and Turn

Starting at

$520⁹⁹

$1575⁹⁹

$1055 OFF

What features should I look for in a king mattress if I'm a side sleeper? + -

Side sleepers should look for a king mattress with good pressure relief, especially around the shoulders and hips. Memory foam or hybrid mattresses often provide the contouring needed to support these areas.

Why is memory foam recommended for side sleepers? + -

Memory foam is recommended for side sleepers because it conforms to the body's shape, providing targeted support and alleviating pressure points, which is crucial for maintaining proper spinal alignment.

Are hybrid mattresses suitable for side sleepers? + -

Yes, hybrid mattresses are suitable for side sleepers as they combine the contouring benefits of memory foam with the support of innerspring coils, offering both comfort and stability.

How can a king mattress improve sleep quality for side sleepers? + -

A king mattress provides ample space, allowing side sleepers to move freely and find their optimal sleeping position without feeling cramped. This can lead to better sleep quality and reduced discomfort.

Should side sleepers consider mattress firmness when choosing a king mattress? + -

Yes, side sleepers should consider medium to medium-soft firmness levels when choosing a king mattress. This range typically offers the right balance of support and cushioning needed to relieve pressure points.