A hidden wall storage system is disclosed. In one embodiment, a wall depository includes: a storage receptacle assembly adapted for secure, concealed placement in an opening formed within a building wall, generally between a pair of wall studs, the receptacle defined by a rear wall, a left side wall, a right side wall, a top wall, and a bottom wall; and a frame assembly hingedly coupled to the storage receptacle assembly and adapted to pivot outwardly to expose a storage receptacle and to close inwardly to secure and conceal the storage receptacle.