| A Box of Their Best | |
| Type: | Box set |
| Artist: | Electric Light Orchestra |
| Cover: | ELOAboxoftheirbestalbum frontcover.jpg |
| Recorded: | May 1975–April 1979 |
| Length: | 2:35:52 |
| Label: | Epic |
| Producer: | Jeff Lynne |
| Prev Title: | ELO's Greatest Hits |
| Prev Year: | 1979 |
| Next Title: | Xanadu |
| Next Year: | 1980 |
A Box of Their Best is the first US box set by Electric Light Orchestra (ELO), released in 1980. It consisted of the albums A New World Record (with the sides reversed), Out of the Blue and Discovery. Also included was Jeff Lynne's first ever solo single, "Doin' That Crazy Thing". This single, a one-sided single that was marked as a promo, was not in all releases of the box. The box set is almost identical to the UK release Four Light Years, released the same year.
See main article: A New World Record, Out of the Blue (Electric Light Orchestra album) and Discovery (Electric Light Orchestra album). All songs written by Jeff Lynne.