Arisia is a Boston-area, volunteer-run science fiction convention, named for a planet in the Lensman novels by E. E. "Doc" Smith.

In 2019, Arisia moved back to the Boston Park Plaza Hotel temporarily as a result of a strike at Boston-area Marriott properties, including the Westin.

[1] Regular events include one of the largest Masquerades (costume contests) on the East Coast; "Fast Track" programming for children; a demonstration of historical fighting techniques; gaming; film, video, and anime rooms; and a Friday night Kabbalat Shabbat Jewish prayer service.

[6] Other events that have been recently included are a blood drive, a drumming circle, Friday and Saturday evening dances, and live radio dramas.

Corporate membership costs $24 per year starting in September, pro-rated for members who join during later months.