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.^[1]

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