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| Madison Jeffries | |
| Aliases: | Box |
| Continuity: | Marvel Universe |
| Notability: | Supporting character |
| Type: | Superhero |
| Gender: | Male |
| Race: | Mutant |
| Location: | British Columbia, Canada |
| Associations: | Alpha Flight United States Army |
| Status: | Alive |
| First: | Alpha Flight #1 |
Madison Jeffries is a fictional mutant, and a supporting character featured in comic book titles published by Marvel Comics. He first appeared in Alpha Flight, Volume 1 #1 in August, 1983. He made appearances as a civilian for several issues until ultimately taking on the armor and mantle of Box, becoming the second Canadian character to do so.