|Location||Marquette University, Milwaukee, Wisconsin|
|Dates||July 24-27, 1987|
Mythcon XVIII was the eighteenth annual Mythopoeic Society conference.
- Theme: Looking Back From Weathertop: A Fifty Years' Retrospective on The Hobbit
- Guest of Honors: Christopher Tolkien (Tolkien scholar and executor) and John Bellairs (fantasy author)
- Chairman: Gregory G.H. Rihn