Mississauga Mayor Hazel McCallion, shown in a file photo, was first elected mayor of Mississauga in 1978.Mississauga Mayor Hazel McCallion, shown in a file photo, was first elected mayor of Mississauga in 1978. (CBC)

Canada's oldest mayor is aiming to serve her 12th consecutive term as the boss of the country's sixth largest city, Mississauga, Ont.

Hazel McCallion, 89, filed her nomination papers for the Oct. 25 municipal election Wednesday afternoon, according to the city website.

About an hour later McCallion held a news conference where she confirmed her intentions.

"Well I'm quite excited," she said. "At two o'clock today I registered to run. It was a matter of formality because for many months I've been saying to the people of Mississauga that I was going to offer myself to them for another four years."

McCallion was first elected mayor of Streetsville in 1970, which was later incorporated into the new City of Mississauga. She was elected Mississauga mayor for the first time in 1978 and has held the office ever since.

McCallion is known for her no-nonsense style of administration, but her last term included some controversy.

She and her son Peter McCallion have been the subjects of an inquiry into a $14.4-million land deal.

The results of the inquiry will not be available until after the vote.

Currently, there are 13 people registered to run for mayor. Nominations close on Friday.