Skip to main content

Flash Sale: Extra 15% off⁹ with code AFTERHOURS

King Size Mattresses

Providing the most room of any bed, couples find they have more space to accommodate their different sleep positions (and their pet!).

277

results

King

Best Seller

BR800 13.5" Medium Pillow Top Mattress

Beautyrest BR800 13.5" Medium Pillow Top Mattress

King

Medium Comfort, best for

All Sleep Positions
Toss and Turn
Pain

7 Sizes

FREE ADJUSTABLE BASE³ up to $499 value with code ELEVATE (must add base to cart)

Delivery in6+ weeks

Best Seller

Midnight Dream II 11.5" Firm Mattress

Beauty Sleep® Midnight Dream II 11.5" Firm Mattress

King

Firm Comfort, best for

Back and Stomach Sleepers
Toss and Turn
Bed Partner

6 Sizes

Delivery in6+ weeks

Best Seller

Midnight Dream II 12.25" Medium Euro Top Mattress

Beauty Sleep® Midnight Dream II 12.25" Medium Euro Top Mattress

King

Medium Comfort, best for

All Sleep Positions
Toss and Turn
Bed Partner

6 Sizes

Delivery in6+ weeks

Best Seller

By Sealy® Medium Euro Top Mattress

Sleepy's By Sealy® Medium Euro Top Mattress

King

Medium Comfort, best for

All Sleep Positions
Pain
Temperature

7 Sizes

FREE ADJUSTABLE BASE³ up to $499 value with code ELEVATE (must add base to cart)

Delivery in6+ weeks

Best Seller

Bamboo 12" Medium Plush Green Tea Memory Foam Mattress

Tulo Bamboo 12" Medium Plush Green Tea Memory Foam Mattress

King

Medium Comfort, best for

All Sleep Positions
Toss and Turn
Pain

5 Sizes

Delivery in6+ weeks

Having trouble deciding?

Best Seller

Silver® BRS900 11.75" Extra Firm Mattress

Beautyrest Silver® BRS900 11.75" Extra Firm Mattress

King

Extra Firm Comfort, best for

Back and Stomach Sleepers
Bed Partner
Pain

6 Sizes

FREE ADJUSTABLE BASE³ up to $499 value with code ELEVATE (must add base to cart)

Delivery in6+ weeks

Best Seller

PressureSmart™ 2.0 Plush 11.75" Mattress

Beautyrest PressureSmart™ 2.0 Plush 11.75" Mattress

King

Plush Comfort, best for

Side Sleepers
Pain
Temperature

8 Sizes

FREE ADJUSTABLE BASE³ up to $499 value with code ELEVATE (must add base to cart)

Delivery in6+ weeks

Best Seller

TEMPUR-ProAdapt® 12" Medium Hybrid Mattress

Tempur-Pedic TEMPUR-ProAdapt® 12" Medium Hybrid Mattress

King

Medium Comfort, best for

All Sleep Positions
Pain
Bed Partner

7 Sizes

Receive $300 Instant Gift⁴ with purchase.

Delivery in6+ weeks

Posturepedic® Elite Hybrid High Point II 14" Medium Mattress

Sealy Posturepedic® Elite Hybrid High Point II 14" Medium Mattress

King

Medium Comfort, best for

All Sleep Positions
Pain
Temperature

6 Sizes

Receive $200 Instant Gift⁴ with purchase.

Delivery in6+ weeks

Best Seller

Black® Series Three 15.25" Medium Mattress

Beautyrest Black® Series Three 15.25" Medium Mattress

King

Medium Comfort, best for

All Sleep Positions
Pain
Bed Partner

6 Sizes

FREE ADJUSTABLE BASE³ up to $499 value with code ELEVATE (must add base to cart)

Delivery in6+ weeks

Best Seller

Bamboo 10" Medium Plush Green Tea Memory Foam Mattress

Tulo Bamboo 10" Medium Plush Green Tea Memory Foam Mattress

King

Medium Comfort, best for

All Sleep Positions
Toss and Turn
Pain

5 Sizes

Delivery in6+ weeks

Best Seller

BR800 12" Medium Mattress

Beautyrest BR800 12" Medium Mattress

King

Medium Comfort, best for

All Sleep Positions
Toss and Turn
Pain

7 Sizes

Delivery in6+ weeks

Best Seller

Basic Innerspring Firm Mattress

Sleepy's Basic Innerspring Firm Mattress

King

Firm Comfort, best for

Back and Stomach Sleepers

5 Sizes

Delivery in6+ weeks

Only at Mattress Firm

Bamboo 8" Medium Green Tea Memory Foam Mattress

Tulo Bamboo 8" Medium Green Tea Memory Foam Mattress

King

Medium Comfort, best for

All Sleep Positions
Toss and Turn
Pain

5 Sizes

Delivery in6+ weeks

14 of 277 results

King Size Mattresses

Measuring 76" wide and 80" long, a king size mattress provides plenty of space for a couple to sleep comfortably. Not every bedroom can fit a king mattress, so be sure to measure that the king mattress size is not too big for your sleeping space before getting your heart set on one of the many king bed mattress options available. Simmons was the first company to market the king mattress size.

Loading footer...