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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!).

280

results

King

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

Best Seller

TEMPUR-Adapt® 11" Medium Mattress

Tempur-Pedic TEMPUR-Adapt® 11" Medium Mattress

King

Medium Comfort, best for

All Sleep Positions
Pain
Bed Partner

7 Sizes

Receive $300 Instant Gift⁴ with purchase.

Delivery in6+ weeks

Best Seller

By Sealy® Slumber Firm Mattress

Sleepy's By Sealy® Slumber Firm Mattress

King

Firm Comfort, best for

Back and Stomach Sleepers
Bed Partner
Toss and Turn

6 Sizes

Delivery in6+ weeks

Best Seller

Midnight Dream 14.25" Ultra Plush Pillow Top Mattress

Beauty Sleep® Midnight Dream 14.25" Ultra Plush Pillow Top Mattress

King

Ultra Plush Comfort, best for

Side Sleepers
Toss and Turn
Bed Partner

6 Sizes

Delivery in6+ weeks

Best Seller

BR800 13.5" Plush Pillow Top Mattress

Beautyrest BR800 13.5" Plush Pillow Top Mattress

King

Plush Comfort, best for

Side Sleepers
Toss and Turn
Pain

7 Sizes

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

Delivery in6+ weeks

Having trouble deciding?

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

PressureSmart™ 2.0 Firm 11" Mattress

Beautyrest PressureSmart™ 2.0 Firm 11" Mattress

King

Firm Comfort, best for

Back and Stomach 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

Basic Innerspring Firm Mattress

Sleepy's Basic Innerspring Firm Mattress

King

Firm Comfort, best for

Back and Stomach Sleepers

5 Sizes

Delivery in6+ weeks

Best Seller

Silver® BRS900-C 13.75" Extra Firm Mattress

Beautyrest Silver® BRS900-C 13.75" 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

Midnight Dream 14.25" Medium Pillow Top Mattress

Beauty Sleep® Midnight Dream 14.25" Medium Pillow Top Mattress

King

Medium Comfort, best for

All Sleep Positions
Toss and Turn
Bed Partner

6 Sizes

Delivery in6+ weeks

Best Seller

By Sealy® Spring Medium Mattress

Sleepy's By Sealy® Spring 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

Greenwood 10.5" Firm Mattress

Beautyrest Greenwood 10.5" Firm Mattress

King

Firm Comfort, best for

Back and Stomach Sleepers
Pain
Toss and Turn

6 Sizes

Delivery in6+ weeks

Silver® BRS900 12" Plush Mattress

Beautyrest Silver® BRS900 12" Plush Mattress

King

Plush Comfort, best for

Side 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

BR800 11.25" Firm Mattress

Beautyrest BR800 11.25" Firm Mattress

King

Firm Comfort, best for

Back and Stomach Sleepers
Toss and Turn
Pain

7 Sizes

Delivery in6+ weeks

14 of 280 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.

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