Two different polls show Don Atchison leading the pack in this year's Saskatoon mayoral election.

The latest survey from Mainstreet Research/Postmedia shows Atchison receiving 32 per cent support, up from 30 per cent in the previous poll. Meanwhile, a new poll from Insightrix Research/CKOM places Atchison at 28 per cent support.

However, the two polls differ when it comes to second and third place. The Mainstreet poll shows support for Charlie Clark, who had been trailing both Atchison and Kelley Moore in polls done in October, has grown to 28 per cent. Moore, meanwhile, has slipped to 20 per cent. The fourth candidate, Devon Hein, now sits at three per cent. The poll showed 17 per cent of voters remain undecided.

The Insightrix poll shows Moore with 24 percent support of undecided voters, and Clark in third place at 21 per cent. Hein takes fourth place at one per cent. 18 per cent said they were uncertain who they would vote for, and eight per cent withheld a response.

"Don Atchison's lead is not insurmountable but with many of Kelley Moore's soft supporters leaning towards Atchison - not Clark, it will be tough for the Clark campaign to peel off voters," David Valentin, executive vice-president of Mainstreet Research, said in a release.

"A skilled turnout operation may not be enough; it still looks like Clark will need to persuade voters to leave Atchison or Moore if he is to win on Wednesday."

Valentin said Atchison is the candidate to beat in this election.

The election is on Wednesday.

The Mainstreet poll was based on telephone interviews with 799 people who were selected at random based on cellphone and land line numbers. A probabilistic sample of this size would yield a margin of error of +/- 3.47 per cent, 19 times out of 20.

The Insightrix poll was held online, with a sample size of 800 randomly selected panel members between October 20-22nd. Since the research is conducted online, it is considered to be a non-probability proportion sample and therefore, margins of error are not applicable.