List of bridges on the National Register of Historic Places in Idaho

This is a list of bridges and tunnels on the National Register of Historic Places in the U.S. state of Idaho.

Name	Image	Built	Listed	Location	County	Type
Boise River and Canal Bridge		1922	2007-02-07	Caldwell 43°41′20″N 116°41′10″W	Canyon	Warren camelback through truss
Bullion Tunnel		1910	1984-09-20	Avery 47°24′4″N 115°42′4″W	Shoshone
Capitol Boulevard Memorial Bridge		1931	1990-11-05	Boise 43°36′32″N 116°12′26″W	Ada
Cold Springs Pegram Truss Railroad Bridge		1894, 1917	1997-07-25	Ketchum 43°39′14″N 114°20′58″W	Blaine	Pegram through truss
Conant Creek Pegram Truss Railroad Bridge		1894, 1911, 1916	1997-07-25	Grainville 44°0′52″N 111°21′51″W	Fremont	Pegram through truss
Gimlet Pegram Truss Railroad Bridge		1894, 1914	1997-07-25	Ketchum 43°35′53″N 114°20′43″W	Blaine	Pegram through truss
Grace Pegram Truss Railroad Bridge		1894, 1913	1997-07-25	Grace 42°35′6″N 111°44′5″W	Caribou	Pegram through truss
Ninth Street Bridge		1911	2001-09-14	Boise 43°36′34″N 116°12′29″W	Ada	Pratt through truss
North Fork Payette River Bridge		1933	1999-04-02	Smiths Ferry 44°19′32″N 116°3′30″W	Valley	Reinforced concrete arch
Owsley Bridge		1921	1998-09-18	Hagerman 42°45′52″N 114°53′21″W	Gooding	Cantilevered Warren truss
Ririe A Pegram Truss Railroad Bridge		1894, 1914	1997-07-25	Ririe 43°39′59″N 111°44′16″W	Jefferson	Pegram through truss
Ririe B Pegram Truss Railroad Bridge		1894, 1914	1997-07-25	Ririe 43°39′37″N 111°44′25″W	Jefferson	Pegram through truss
St. Anthony Pegram Truss Railroad Bridge		1896, 1914	1997-07-25	St. Anthony 43°57′1″N 111°42′59″W	Fremont	Pegram through truss
Washington Water Power Bridges		1929, 1930	1996-12-20	Post Falls 47°42′40″N 116°57′8″W	Kootenai	Concrete arch/girder