A one-piece paint brush holder for removable-insertion use with a container having a bottom surface, an inner side wall and an upper edge is provided in one embodiment. The holder includes a base portion. The holder further includes a post portion having a lower end extending from the base portion, an intermediate portion extending upwardly from the lower end, and an upper end supported above and extending from the intermediate portion. The holder still further includes a generally horizontal support portion extending from the upper end of the post portion and having a distal end. The intermediate portion of the post portion has a hook portion vertically between the base portion and the support portion. The hook portion has a downwardly opening shape to permit the holder to be supported on the upper edge of the container at a position above an inserted position in the container. The base, post, hook and support portions are formed by bending a single rod. In another embodiment, a paint brush holder assembly having various attachment portions is provided.