Anna Gomez, a telecommunications attorney, was nominated by Biden last May.
She also served as the National Telecommunications and Information Administration Deputy Administrator from 2009 to 2013.
With her confirmation, Democrats will have a 3-2 majority on the commission.
In addition to issues like net neutrality, the agency likely will give greater scrutiny to proposed mergers.
The FCCs tougher stance toward mergers reflects similar scrutiny at the Federal Trade Commission and the Justice Department.
The regulatory environment has been a caveat to ongoing speculation of industry consolidation.
