Its responsibilities include: In July 2012, Chief Electoral Officer Greg Essensa announced the April disappearance of two USB flash drives holding data on 2.4 million voters in 25 Ontario ridings.

[8] Merchant Law Group filed a class action suit with the Ontario Superior Court of Justice on July 20, 2012.

[6][9][10] Information and Privacy Commissioner Ann Cavoukian issued a report with recommendations on the incident on July 31, 2012.

[11] On February 19, 2015, Chief Electoral Officer Greg Essensa delivered a report to the Ontario legislature alleging that Premier Kathleen Wynne's chief-of-staff Patricia Sorbara and Sudbury riding organizer Gerry Lougheed Jr. had offered a job to Andrew Olivier, who intended to run to be the Liberal candidate in the by-election.

[13][14] The Globe and Mail reported on May 20, 2018, that Elections Ontario had launched an investigation in response to a complaint that Progressive Conservative Party of Ontario candidates allegedly used data stolen from the 407 ETR toll highway to further party nomination campaigns in several ridings.