The Nationals have had several different logo designs during the franchise's 53 year history.

Washington Nationals logo from 2011-2021
2011-2021
Washington Nationals logo from 2005-2010
2005-2010
Washington Nationals logo from 1992-2004
1992-2004
as Montreal Expos
Washington Nationals logo from 1969-1991
1969-1991
as Montreal Expos