An adjustable garbage can holder that conserves space by mounting to a deck rail includes integral rails sized and positioned for receiving a waste basket therein. Select rails are spaced and extend vertically along the body while other rails have substantially annular shapes spaced along top and bottoms portions of the body for defining a diameter thereof. One of the select rails has a slot formed therein and is positionable adjacent to a support surface. The other rails have end portions securable to each other for selectively adjusting the diameter of the body. The body includes a flange portion that is engageable with the support surface for cooperating therewith to maintain the body at a substantially stable position. The apparatus further includes brackets for attaching the body to the support surface.