ArmadilloCon is a science fiction convention held annually in Austin, Texas, USA, since 1979. As the second longest running science fiction convention in Texas, it is sponsored by the Fandom Association of Central Texas and is known for its emphasis on literary science fiction. ArmadilloCon was originally held in mid-October during the weekend of the Texas-OU football game, but moved to a late-summer/early-fall weekend in 1998.

ArmadilloCon generally focuses on literary science-fiction, with guests of honor typically being up-and-coming writers. Unique programming includes a "Fannish Feud" which has been held regularly since ArmadilloCon 4 in 1982, and has been hosted by a variety of people, including Pat Cadigan, Walter Jon Williams, and Professor Griffin. The convention typically includes a large number of readings, and for some years ended with a story reading by Howard Waldrop.

A key element of the convention is the ArmadilloCon Writers' Workshop. The workshop was started in 1998, instigated by Chairs A.T. Campbell III and Lori Wolf. The workshop is held during the day on the Friday of the convention, with a Writers' Track of sessions available during the rest of the weekend.