Abstract: An expandable and collapsible grain bin is provided, comprising: two telescoping cylindrical sections, an upper bin section and a lower bin section, the two telescoping cylindrical sections adapted to automatically interlock with one another when the grain bin is in an expanded position; a first lifting system for lifting the upper bin section until the upper bin section automatically interlocks with the lower bin section and lowering the upper bin section when collapsing the grain bin for storage or transport; and a bin cover attached at or near the top of the upper bin section for enclosing the grain bin.