| LoneStarCon 2, the 55th World Science Fiction Convention | |
| Dates: | 28 August–1 September 1997 |
| Organizer: | Austin Literary Arts Maintenance Organization, Inc. |
| Filing: | 501(c)(3) non-profit |
| Attendance: | 4,634 |
| Website: | alamo-sf.org/lonestarcon2 |
The 55th World Science Fiction Convention (Worldcon), also known as LoneStarCon 2, also known as "The Second Occasional LoneStarCon Science Fiction Convention & Chili Cook-off", was held on 28 August–1 September 1997 at the Marriott Rivercenter, Marriott Riverwalk, and the Henry B. Gonzalez Convention Center in San Antonio, Texas, United States. The first LoneStarCon, held in Austin, Texas, had been the North American Science Fiction Convention (NASFiC) in 1985, when the 43rd Worldcon was held in Australia.
The supporting organization was the Austin Literary Arts Maintenance Organization (ALAMO). The chairman was Karen Meschke.
Attendance was 4,634, out of 5,614 paid memberships.