A state Supreme Court justice has slapped the electioneering arm of the labor-backed Working Families Party for failing to comply with his orders more than a year ago that it become independent of the party.

Court papers obtained by The Post show the election-services company — Data and Field Services — is being held in contempt of court because it did not re-establish itself as a for-profit corporation after Justice Anthony Giacobbe instructed it to do so as part of a settlement in February 2010. Instead, it reformed as a taxable nonprofit.

In his ruling, Giacobbe also lambasted DFS for forming a board with ties to the WFP — something he ordered them not to do.

He also criticized the company for offering its clients a sophisticated voter database without determining its monetary value, as he had ordered last year.

DFS must pay the plaintiffs $250, and has 30 days to comply fully with Giacobbe’s orders.

“We are surprised by this decision and are still reviewing it,” DFS spokesman Mike Boland said.