In the 2007 provincial general election, there were 599 candidates on the ballots and 12 registered parties.
The candidates are vying to fill 107 seats in the legislature.
Ten days of advance voting will take place at locations across the province from Sept. 21 to Sept. 30. Special ballot voting continues at returning offices until Oct. 5.
On election day, voting locations will be open from 9 a.m. to 9 p.m.
Premier Dalton McGuinty is taking Saturday off campaigning, while Progressive Conservative Leader Tim Hudak has a morning photo opportunity at the Bloor West Village Toronto Ukrainian Festival.
New Democratic Party Leader Andrea Horwath continues her northern Ontario tour with stops in North Bay, Temagami, and New Liskeard.
Campaigning Friday in the North, Horwath defended her plan for northern Ontario as her opponents questioned the NDP commitment to job creation in the region.
At a Bombardier plant in Thunder Bay, Horwath touted her party's Buy Ontario plan, which critics have labelled a protectionist policy that would hamper industry.
Horwath also rejected Liberal accusations that she voted against transit investments that would have brought work to the north, saying the proposals were buried in omnibus budget bills.
McGuinty found himself fighting accusations that his campaign fired up an idled solar panel plant just for a photo opportunity.
No one was trying to fool reporters Tuesday when he toured what appeared to be a busy assembly line at Toronto's Eclipsall Energy, even though the company has halted production, McGuinty said Friday.
Production has temporarily shut down because Eclipsall went through their inventory faster than expected, which is a "great news," he added.
Hudak attacked McGuinty on Friday over an Ontario non-profit, partly funded by taxpayer dollars, which unveiled two ads touting the Liberal government's green initiatives.
The situation looks "awfully fishy," Hudak said.
The Ontario Sustainable Energy Association launched two 30-second television ads Friday which, according to the company, profile "the strengths and benefits of an Ontario-made green energy economy."
The ads, which cost just under $200,000 to produce, were "100 per cent paid for by membership money" raised through fundraising, the agency said.