- ICON-2002: First International Conference on Natural Language Processing at NCST, Mumbai (presently called as CDAC-Mumbai), Dec 2002
- ICON-2003: Second International Conference on Natural Language Processing at CIIL Mysore, Dec 2003
- ICON-2004: Third International Conference on Natural Language Processing at IIIT Hyderabad, Dec 2004
- ICON-2004: Third International Conference on Natural Language Processing at IIIT Hyderabad, Dec 2004
- ICON-2005: Fourth International Conference on Natural Language Processing at IIT Kanpur, Dec 2005
- ICON-2005: Fourth International Conference on Natural Language Processing at IIT Kanpur, Dec 2005
- ICON-2007: Fifth International Conference on Natural Language Processing at IIIT Hyderabad, Jan 2007
- ICON-2008: Sixth International Conference on Natural Language Processing at CDAC Pune, Dec 2008
- ICON-2009: Seventh International Conference on Natural Language Processing at IIIT-H and University of Hyderabad, Dec 2009.
- ICON-2010: Eighth International Conference on Natural Language Processing at IIT Kharagpur, Dec 2010.
- ICON-2011: Ninth International Conference on Natural Language Processing at Anna University, Chennai, Dec 2011.
- ICON-2013: Tenth International Conference on Natural Language Processing at CDAC Noida, Dec 2013.
- ICON-2014: Eleventh International Conference on Natural Language Processing at Goa University, Goa, Dec 2014.
- ICON-2015: Twelfth International Conference on Natural Language Processing at IIITM-Kerala, Trivandrum, Dec 2015.
- ICON-2016: Thirteenth International Conference on Natural Language Processing at IIT (BHU), Varanasi, Dec 2016.