King Memory Foam Mattresses

4 king memory foam mattresses from Novilla, Nectar, Sweetnight and more. Prices run $507 to $4,099.

King mattresses whose title says memory foam: foam throughout, no coils.

We do not pick by hand: a mattress is here because its listed specs pass the checks.

Serta

King, Memory Foam, Firm, 11 to 12 in

+CertiPUR-US certified foam for a material standard

+Ships boxed for easier delivery to a home

+King size for couples or extra sleeping room

$506.88-5%Was: ~~$535.49~~

as of 11/04/2026 02:37 PST - Details

Generic

King, Memory Foam, Firm, 8 to 10 in

+King size fits two sleepers or a larger frame

+Memory foam conforms to the body

+CertiPUR-US certified foam

−Firm feel may feel hard for side sleepers

No price recorded yet.

Tempur-Pedic

King, Memory Foam, Firm, 13 in and up

$4,099.99

as of 11/04/2026 05:39 PST - Details

Tempur-Pedic

King, Memory Foam, Firm, 11 to 12 in

+King size fits larger beds and two sleepers

+Cooling cover for hot sleepers

+All memory foam construction

−Firm feel may not suit side sleepers seeking softness

$3,799.99

as of 11/04/2026 05:39 PST - Details

Compare specs

Size	Type	Firmness	Thickness	Spec score	Price
King	Memory Foam	Firm	11 to 12 in	n/a	$506.88 as of 11/04/2026 02:37 PST - Details
King	Memory Foam	Firm	8 to 10 in	n/a	No current price
King	Memory Foam	Firm	13 in and up	n/a	$4,099.99 as of 11/04/2026 05:39 PST - Details
King	Memory Foam	Firm	11 to 12 in	n/a	$3,799.99 as of 11/04/2026 05:39 PST - Details

Spec scores, pros and cons, and prices are explained in the How it works section of the About page.