An ergonomic tool handle is designed for “one-handed” use by incorporating a hand grip and a forearm support in a compact arrangement. The tool handle includes a longitudinal shaft with a vertical hand grip formed at one end and a forearm support at the opposing end. The hand grip is essentially U-shaped and oriented such that the “U” is upside-down and attached to the longitudinal shaft at two separate locations (the “top” ends of each leg of the “U”). The forearm support takes the form of an enlarged support area (with respect to the diameter of the shaft) and in one embodiment is V-shaped (with a cross-member attached between the legs of the “V”). Preferably, various tool implements may be removably attached to the longitudinal shaft of the handle (e.g., screw-on, locking pin, etc.).