Costco King Mattress: A Comprehensive Buying Guide for 2025
King-size mattresses are a popular choice for couples and individuals who prefer extra space while sleeping. Costco offers a wide selection of king mattresses, catering to various sleep styles and budgets. Whether you prefer the contouring support of memory foam, the bounce of an innerspring, or the balanced feel of a hybrid, Costco has options to suit your needs. Below, we break down the key aspects to consider when shopping for a king mattress at Costco, followed by a detailed comparison of top models.

Types of King Mattresses at Costco
Costco stocks several types of king mattresses, each with unique benefits:
- Memory Foam: Known for pressure relief and motion isolation, ideal for side sleepers and couples.
- Innerspring: Provides firm support and airflow, suitable for those who prefer a traditional feel.
- Hybrid: Combines memory foam and innerspring for balanced comfort and support.
- Latex: Offers natural cooling and durability, great for eco-conscious shoppers.
Key Features to Consider
When selecting a king mattress from Costco, consider the following factors:
- Firmness Level: Ranges from plush to firm, depending on sleep position and preference.
- Material Quality: High-density foams and durable coils enhance longevity.
- Cooling Technology: Gel-infused foams or breathable covers help regulate temperature.
- Motion Isolation: Essential for couples to minimize sleep disturbances.
- Warranty and Return Policy: Costco offers generous return windows and warranties.
Comparison of Top King Mattresses at Costco
| Brand | Type | Price (USD) | Firmness | Warranty |
|---|---|---|---|---|
| Sealy Posturepedic | Hybrid | $899.99 | Medium-Firm | 10 Years |
| Tempur-Pedic TEMPUR-Cloud | Memory Foam | $1,499.99 | Medium | 10 Years |
| Novaform ComfortGrande | Memory Foam | $699.99 | Medium-Firm | 20 Years |
| Stearns & Foster Estate | Innerspring | $1,199.99 | Firm | 10 Years |
Customer Reviews and Recommendations
Customer feedback highlights the Sealy Posturepedic as a top choice for its balanced support and durability. The Tempur-Pedic TEMPUR-Cloud is praised for its pressure relief, while the Novaform ComfortGrande offers excellent value for budget-conscious shoppers. Stearns & Foster is recommended for those seeking a firmer, traditional innerspring feel.
Where to Buy and Additional Tips
King mattresses at Costco can be purchased online or in-store, with frequent seasonal discounts for members. Consider measuring your bedroom space before purchasing, as king mattresses require ample room. Always check the return policy and warranty details before finalizing your purchase.
For more information, visit Costco’s official website or consult customer reviews on trusted platforms like Consumer Reports .