Chandy bagged the first prize from the Asia Pacific region with awardees chosen every year from five zones around the world, a release from the CM's office said.
Since 2003, UN has been giving the award as part of its programme for Public Service Day, which is observed on June 23.
The awards, instituted through a UN resolution, are announced after a three-tier scrutiny and detailed examination.
The shortlisted candidates are examined by a seven-member sub-committee of UN's Committee of Experts in Public Administration.
Chandy's mass contact programme has been widely lauded as a unique democratic experiment in which the CM of an Indian state met thousands of people directly without any intermediaries.
He received upto 5.5 lakh petitions, of which around 3 lakh were resolved, and distributed financial assistance of Rs 22.68 crore as part of the programme.
Evaluation criteria for the awards include transparency, mechanisms to increase public's ability to seek and receive information in a timely manner and monitoring and analysing government decision-making and processes.
