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

| Name_ | Built | Listed | Location_ | County |
|---|---|---|---|---|
| Boise River and Canal Bridge | 1922 | 2007-02-07 | Caldwell | Canyon |
| Bullion Tunnel | 1910 | 1984-09-20 | Avery | Shoshone |
| Capitol Boulevard Memorial Bridge | 1931 | 1990-11-05 | Boise | Ada |
| Cold Springs Pegram Truss Railroad Bridge | 1894, 1917 | 1997-07-25 | Ketchum | Blaine |
| Conant Creek Pegram Truss Railroad Bridge | 1894, 1911, 1916 | 1997-07-25 | Grainville | Fremont |
| Gimlet Pegram Truss Railroad Bridge | 1894, 1914 | 1997-07-25 | Ketchum | Blaine |
| Grace Pegram Truss Railroad Bridge | 1894, 1913 | 1997-07-25 | Grace | Caribou |
| Ninth Street Bridge | 1911 | 2001-09-14 | Boise | Ada |
| North Fork Payette River Bridge | 1933 | 1999-04-02 | Smiths Ferry | Valley |
| Owsley Bridge | 1921 | 1998-09-18 | Hagerman | Gooding |
| Ririe A Pegram Truss Railroad Bridge | 1894, 1914 | 1997-07-25 | Ririe | Jefferson |