Here is a list of editions of the conference with links to the conference home pages. There is also a list of previous shared tasks.
2023 - Singapore (in-person)
2022 - Abu Dhabi, United Arab Emirates (hybrid conference)
2021 - Punta Cana, Dominican Republic (hybrid conference)
2020 - Virtual conference
2019 - Hong Kong
2018 - Brussels, Belgium
2017 - Vancouver, Canada
2016 - Berlin, Germany
2015 - Bejing, China
2014 - Baltimore, MD, USA
2013 - Sofia, Bulgaria
2012 - Jeju Island, Korea
2011 - Portland, OR, USA
2010 - Uppsala, Sweden
2009 - Boulder, CO, USA
2008 - Manchester, UK
2007 - Prague, Czech Republic
2006 - New York City, NY, USA
2005 - Ann Arbor, MI, USA
2004 - Boston, MA, USA
2003 - Edmonton, Canada
2002 - Taipei, Taiwan
2001 - Toulouse, France
2000 - Lisbon, Portugal
1999 - Bergen, Norway
1998 - Sidney, Australia
1997 - Madrid, Spain
A fore-runner of CoNLL was the ECML97/MLNet Familiarization Workshop on Empirical Learning of Natural Language Processing Tasks, held in Prague (1997).