| 1980 | King of Prussia, PA | Pennsylvania Clocks |
| 1981 | Rockford, IL | Watches and Clocks |
| 1982 | Sturbridge, MA | New England Handcrafted Clocks and Watches |
| 1983 | Lancaster, PA | Pennsylvania Horology |
| 1984 | Hartford, CT | The Great Horological Transition: Handcrafting to Manufacture |
| 1985 | Portland, OR | British Horology: 1650-1775 |
| 1986 | Dearborn, MI | Horology & Transportation |
| 1987 | Rochester, NY | Upper New York State Clocks |
| 1988 | Santa Monica, CA | French Horology |
| 1989 | Washington, DC | Public Timekeeping |
| 1990 | Houston, TX | The Evolution of Mass Production in Horology |
| 1991 | Fort Mitchell, KY | Midwestern Horology |
| 1992 | Cleveland, OH | Precision Timekeeping |
| 1993 | Cambridge, MA | The Longitude Symposium |
| 1994 | Toronto, Ontario, Canada | Canadian Horology |
| 1995 | Harrisburg, PA | American Tall Case Clockmaking |
| 1996 | Rockford, IL | Railroad Timekeeping |
| 1997 | Bristol, CT | Time and Time Again: Yankee Technology and Timekeepers for the working man |
| 1998 | Williamsburg, VA | Southern Horology |
| 1999 | Minneapolis, MN | Vienna Regulators |
| 2000 | London, England | 1000 Years of British Timekeeping |
| 2001 | Convington, KY | The Wristwatch-Timepiece of the 20th Century |
| 2002 | Boxborough, MA | Boston: Cradle of Industrial Watchmaking |
| 2003 | St. Louis, MO | The Torsion Pendulum Clock and Its Place in Horology |
| 2004 | Portland, OR | Horology and Science |
| 2005 | Houston, TX | Inventions and Inventors in American Horology |
| 2006 | Cleveland, OH | American Watchmaking II: From Craft to Industry |
| 2007 | York, PA | The Impact of Mass Production on the American Clock Industry |
| 2008 | Springfield, IL | Electric Horology |
| 2009 | No Symposium | |
| 2010 | Williamsburg, VA | On Conservation, Restoration, and Repair |
| 2011 | Hebron, KY | Ohio Horology |
| 2012 | Bloomington, MN | Carriage Clocks |
| 2013 | Pasadena, CA | Time for Everyone |
| 2014 | Ft. Lauderdale, FL | Beauty, Precision and Craftsmanship of French Clocks |
| 2015 | Houston, TX | Mechanical Music and Marvel |
| 2016 | Winterthur, DE | Clocks at Winterthur |
| 2017 | Boston, MA | Horology in Art |
| 2018 | Dearborn, MI | Cars, Clocks, and Watches |
| 2019 | Nuremberg, Germany | Time Made in Germany |
| 2020 | No Symposium | |
| 2021 | Philadelphia, PA | Horology 1776 |
| 2022 | New York City, NY | Horology’s Great Collectors |
| 2023 | Lancaster and Columbia, PA | Lancaster Legacy |