Abstract: The cover for an outdoor furniture cushion provides a decorative appearance when applied to a generally utilitarian outdoor furniture cushion. The cover is preferably formed of moisture-resistant fabric, such as canvas, cotton duck, or denim. The cover may be formed in any width to install over a single seat cushion or a wider cushion, as on a settee or the like. The cover has fasteners on opposite edges that wrap around beneath the cushion to secure to one another, either directly or via straps. The lateral edges of the cover include fasteners for interchangeable application of various trim elements thereto in order to conceal the edges of the underlying cushion. The trim elements may be formed to have a number of different appearances, enabling the user of the cover to exchange trim components to suit the occasion or provide a fresh appearance.