BANGOR — A federal lawsuit is asking a judge step up Maine’s redistricting schedule to ensure the task is completed in time for next year’s congressional elections.

Maine law requires congressional redistricting to be done in 2013. Timothy Woodcock, who filed the lawsuit on behalf of two southern Maine residents, contends there’s no good reason to wait until then since the 2010 Census data is already available.

The federal complaint, filed today, contends the new Census data points to a population shift that means there’ll be nearly 9,000 more residents in the southern 1st Congressional District than in the 2nd District.

Woodcock says Maine may be the only state with a 2013 deadline. His lawsuit names the governor, secretary of state and others. The state had no immediate comment.