Jo-Ellen Darcy is an American government official, most recently serving as the assistant secretary of the army (civil works) from August 11, 2009, to January 20, 2017.

In the 1980s, she joined the office of Governor of Michigan James Blanchard, serving as assistant to the director of personnel for gubernatorial appointments.

In 1993, Darcy became a staff member of the United States Senate Committee on Environment and Public Works.

During her seven years on the EPW Committee staff, she worked on the Safe Drinking Water Act, the Clean Water Act, the committee's oversight of the United States Army Corps of Engineers and the Federal Emergency Management Agency, and Everglades restoration.

On April 3, 2009, President of the United States Barack Obama nominated Darcy as Assistant Secretary of the Army (Civil Works), and, after Senate Confirmation, she assumed office on August 11, 2009.