The Labor Party is going to court to fight for a recount in Ripon, the regional seat the Liberals won by just 15 votes.

The Victorian Electoral Commission declared Liberal MP Louise Staley had officially retained her seat of Ripon, in western Victoria, on December 10, edging out Labor's Sarah De Santis in the tightest-fought contest this election.

Ripon MP Louise Staley is set to be returned with a tiny margin. Credit:Charlotte Grieve

But Labor's assistant state secretary Kosmos Samaras revealed on Monday evening the party will take court action to challenge the result.

"We will be lodging an appeal with the court of disputed returns," he said. "The Labor party holds concerns that a formal recount was not performed."