Best Mattresses Under $300

Nothing in this catalog under $300 is a low-quality mattress by default, but there are patterns worth knowing. Extra firm feel and the highest published thickness in the catalog, 16 inches, tend to sit above $300, and features like a certified foam layer or a manufacturer cooling feature are less consistent below that price than above it, though several picks below do include one or both. Larger sizes, king and California king, are harder to find under $300 than queen, full or twin XL, simply because more material costs more to manufacture.

Construction type is not the deciding factor for price here. Both memory foam and hybrid mattresses show up well under $300, and the cheapest pick on this whole page is a 12 inch hybrid rather than an all-foam mattress, so a tight budget does not automatically mean giving up a coil base. What tends to move price most within this catalog is thickness and size rather than whether the mattress is foam or hybrid.

It also helps to know how these prices were checked. Amazon prices on mattresses move often, sometimes within the same week, so a mattress that qualified as under $300 during research could climb over that line later, or a mattress just above $300 could drop under it. We pulled the price listed on each product page at the time of research and did not average or estimate across time, which is also why we recommend confirming the live price before ordering rather than treating the figures here as fixed.

The mattresses below are grouped by how much of that value they still deliver: a Beginner tier for the lowest prices in the catalog, an Intermediate tier for the best balance of size and features under $300, and an Expert tier for the largest sizes that still come in under the $300 line.

These are the published prices and sizes for six under-$300 picks at the time of research, not a guideline or an average.