The delegation will shrink from 18 to 16 in the 2012 elections.
Ohio's population rose by 1.6 percent. It is now 11,536,504.
Michigan is the only state to lose population. Texas will gain four seats. Florida gets two more. Washington, Nevada, Utah , Arizona, Georgia and South Carolina each get one more.
New York will also lose two. Michigan, Pennsylvania, Illinois, Missouri, Louisiana, Iowa, New Jersey and Massachusetts will each lose one seat.
The Census Bureau made the announcement Tuesday.
This will set off a political tug-of-war with Republicans likely to come out stronger. They control the redistricting process and will decide how the new districts are carved.
This will mean Ohio has less voting clout in Congress and will lose federal dollars in programs calculated by population.
Many speculate that largely Democratic Northeast Ohio will lose at least one representative because of its declining population.
U.S. Representative Marcia Fudge is likely to preserve her largely African-American district to guarantee compliance with the Voting Rights Act.
Some think Fudge's district could be moved west and set up a possible showdown between Congressman Dennis Kucinich and Congresswoman Betty Sutton.
Republicans now control 13 of Ohio's 18 seats in Congress. The Republican-controlled state Legislature and Republican Governor-Elect John Kasich will oversee Congressional redistricting.