Split King Mattresses
Enjoy personalized comfort with our Split King Mattresses at Ortho Mattress. A split king mattress is made of two twin XL mattresses placed side by side, allowing each sleeper to choose their own comfort level—perfect for couples with different sleep preferences. Our split king mattresses for sale offer the same spacious feel of a king bed with added flexibility, especially when paired with an adjustable base.
Club I Extra Firm
Extra Firm
Innerspring
Adjustable Compatible
Firm
Soft
Starting at
$389.99
COOLQUILT® TECHNOLOGY
COOLQUILT® TECHNOLOGY
COOLQUILT® TECHNOLOGY
ORTHOPLEX® TECHNOLOGY
Avenue II Firm
Extra Firm
Memory Foam
Adjustable Compatible
Firm
Soft
Starting at
$1,519.99
ORTHOPLEX® TECHNOLOGY
$2,039 OFF
HAND BUILT LUXURY
Cosmos LTPS
Luxury Plush
Innerspring
Adjustable Compatible
Firm
Soft
Starting at
$4,499.99
$6,539.98
$2,039 OFF
HAND BUILT LUXURY
Cosmos Plush
Medium
Innerspring
Adjustable Compatible
Firm
Soft
Starting at
$3,499.99
$5,539.98
$2,039 OFF
HAND BUILT LUXURY
Cosmos Firm
Firm
Innerspring
Adjustable Compatible
Firm
Soft
Starting at
$3,499.99
$5,539.98
$200 OFF
$750 OFF
FAQs About Split King Mattresses
What is a Split King mattress?
A Split King mattress is made of two Twin XL mattresses placed side by side. Each Twin XL measures 38" x 80", so together they match the size of a standard King mattress, which is 76" x 80". This setup gives each person their own sleep surface with the same overall space as a King.
How does a Split King mattress work?
Each side of a Split King can move independently—perfect for adjustable bed frames. You and your partner can each choose your preferred firmness or position.
How do you keep Split King mattresses together?
You can use a non-slip mattress connector strap or a fitted King-size mattress pad or sheet set to help hold the two Twin XL mattresses in place.
Are Split King mattresses comfortable?
Yes! They’re just as comfortable as a regular King, with the bonus of custom comfort for each person.
Is a Split King mattress the same as two Twins?
Not exactly. A Split King uses two Twin XL mattresses, which are 5 inches longer than standard Twins. Regular Twin mattresses won’t equal a true King size.