Below is a listing of X12 meetings and their venue. If you know of others or can fill in where we have a question mark, send what you know to support@x12.org.
| Year | Meeting | Location | Hotel |
| 1997 | Summer | Chicago, IL | Hyatt Regency Chicago |
| 1997 | Fall | Los Angeles, CA | Westin Bonaventure |
| 1998 | Winter | Anaheim, CA | Disneyland Resort |
| 1998 | Summer | Columbus, OH | Hyatt Regency Columbus |
| 1998 | Fall | ? | ? |
| 1999 | Winter | Dallas, TX | Hyatt Regency Dallas at Reunion |
| 1999 | Summer | ? | ? |
| 1999 | Fall | ? | ? |
| 2000 | Winter | ? | ? |
| 2000 | Summer | Washington, DC | ? |
| 2000 | Fall | Cincinnati, OH | ? |
| 2001 | Winter | Seattle, WA | Sheraton Seattle |
| 2001 | Summer | St. Louis, MO | Regal Riverfront |
| 2001 | Fall | Miami, FL | Hyatt Regency Miami |
| 2002 | Winter | Seattle, WA | Sheraton Seattle |
| 2002 | Summer | Minneapolis, MN | Hyatt Regency Minneapolis |
| 2002 | Fall | Miami, FL | Hyatt Regency Miami |
| 2003 | Winter | Denver, CO | Adams Mark Denver |
| 2003 | Summer | Nashville, TN | Opryland Hotel |
| 2003 | Fall | San Diego, CA | Sheraton San Diego |
| 2004 | Winter | Seattle, WA | Sheraton Seattle |
| 2004 | Summer | Chicago, IL | Palmer House Hilton |
| 2004 | Fall | Miami, FL | Hyatt Regency Miami |
| 2005 | Winter | Nashville, TN | Opryland Hotel |
| 2005 | Summer | San Diego, CA | Sheraton San Diego |
| 2005 | Fall | Atlanta, GA | Marriott or Westin |
| 2006 | Winter | Seattle, WA | Westin Seattle |
| 2006 | Summer | Chicago, IL | Palmer House Hilton |
| 2006 | Fall | Boston, MA | Westin Boston Waterfront |
| 2007 | Winter | Denver, CO | Grand Hyatt Denver |
| 2007 | Summer | Orlando, FL | Wyndham Orlando Resort |
| 2007 | Fall | Los Angeles, CA | Wilshire Grand |
| 2008 | Winter | Seattle, WA | Sheraton Seattle |
| 2008 | Summer | New Orleans, LA | Sheraton New Orleans |
| 2008 | Fall | Pittsburgh, PA | Omni William Penn |
| 2009 | Winter | Portland, OR | Hilton Portland & Executive Tower |
| 2009 | Summer | Cincinnati, OH | Hilton Netherland Plaza |
| 2009 | Fall | Los Angeles, CA | Wilshire Grand |
| 2010 | Winter | Seattle, WA | Sheraton Seattle |
| 2010 | Summer | Addison, TX | Intercontinental Dallas |
| 2010 | Fall | Cincinnati, OH | Hilton Netherland Plaza |
| 2011 | Winter | Seattle, WA | Sheraton Seattle |
| 2011 | Summer | Addison, TX | Intercontinental Dallas |
| 2011 | Fall | Pittsburgh, PA | Omni William Penn |
| 2012 | Winter | Tampa, FL | Hyatt Regency Tampa |
| 2012 | Summer | Indianapolis, IN | Hyatt Regency Indianapolis |
| 2012 | Fall | Rochester, NY | Hyatt Regency Rochester |
| 2013 | Winter | Seattle, WA | Sheraton Seattle |
| 2013 | Summer | Indianapolis, IN | Hyatt Regency Indianapolis |
| 2013 | Fall | Jacksonville, FL | Hyatt Regency Jacksonville |
| 2014 | Winter | Birmingham, AL | Sheraton Birmingham |
| 2014 | Summer | New Orleans, LA | Hotel Moneleone |
| 2014 | Fall | Cincinnati, OH | Hilton Netherland Plaza |
| 2015 | Winter | Portland, OR | Hilton Portland & Executive Tower |
| 2015 | Summer | San Antonio, TX | Hyatt Regency San Antonio |
| 2015 | Fall | Charlotte, NC | Sheraton Charlotte |
| 2016 | Winter | Portland, OR | Hilton Portland & Executive Tower |
| 2016 | Summer | Addison, TX | Intercontinental Dallas |
| 2016 | Fall | Cincinnati, OH | Hilton Netherland Plaza |
| 2017 | Winter | Seattle, WA | Sheraton Seattle |
| 2017 | Summer | San Antonio, TX | Hyatt Regency Jacksonville |
| 2017 | Fall | Pittsburgh, PA | Westin Convention Center |
| 2018 | Winter | Portland, OR | Hilton Portland & Executive Tower |
| 2018 | Summer | Addison, TX | Intercontinental Dallas |
| 2018 | Fall | Cincinnati, OH | Hilton Netherland Plaza |
| 2019 | Winter | Seattle, WA | Sheraton Seattle |
| 2019 | Summer | San Antonio, TX | Hyatt Regency San Antonio |
| 2019 | Fall | Pittsburgh, PA | Westin Convention Center |
| 2020 | Winter | Portland, OR | Hilton Portland & Executive Tower |
| 2020 | Summer | Virtual | |
| 2020 | Fall | Virtual | |
| 2021 | Winter | Virtual | |
| 2021 | Summer | Virtual | |
| 2021 | Fall | Virtual | |
| 2022 | Winter | Greenville, SC | Hyatt Regency Greenville |
| 2022 | Summer | San Antonio, TX | Hyatt Regency San Antonio |
| 2022 | Fall | Jacksonville, FL | Hyatt Regency Jacksonville |
| 2023 | Winter | Westminster, CO | Westin Westminster |
| 2023 | Summer | San Antonio, TX | Hyatt Regency San Antonio |
| 2023 | Fall | Cincinnati, OH | Hilton Netherland Plaza |
| 2024 | Winter | Sparks, NV | The Nugget Hotel |
| 2024 | Summer | Jacksonville, FL | Hyatt Regency Jacksonville |
| 2024 | Fall | Pittsburgh, PA | Westin Convention Center |
| 2025 | Winter | Philadelphia, PA | Sonesta Philadelphia Rittenhouse Square |
| 2025 | Summer | Saint Paul, MN | Intercontinental Saint Paul Riverfront |
| 2025 | Fall | Greenville, SC | Hyatt Regency Greenville |