Big Slough Creek Bridge
Through truss bridge over Big Slough Creek on CR 90, 0.3 mi. south and 2.2 mi. west of Oskaloosa
Open to traffic
Built 1905

Big Slough Creek Bridge
Warren pony truss bridge over Big Slough Creek on CR 98, 0.8 mi. north and 0.9 mi. west of Oskaloosa
Open to traffic
Built ca. 1930; rehabilitated 2000

Branch Crooked Creek Bridge
Lost pony truss bridge over a branch of Crooked Creek on Saline Road, 2.3 mi. south and 3.0 mi. east of Nortonville
Lost

Branch Delaware River Bridge
Pony truss bridge over a branch of Delaware River on CR 206 OS 1, 6.0 mi. north and 6.9 mi. west of Valley Falls
Open to traffic
Built 1909

Cedar Creek Bridge
Rainbow arch bridge over Cedar Creek on K-900 Parks Route at Perry Wildlife Area
Open to traffic
Built 1928

Crooked Creek Bridge
Lost pony truss bridge over Crooked Creek on CR 175, 2.7 mi. north and 1.3 mi. west of Winchester
Lost
Built ca. 1910

Crooked Creek Bridge
Pony truss bridge over Crooked Creek on CR 182, 3.0 mi. south and 3.0 mi. east of Nortonville
Closed to all traffic
Built ca. 1910

Crooked Creek Bridge
Pony truss bridge over Crooked Creek on Thomas Road, 0.9 mi. south and 4.2 mi. east of Nortonville
Open to traffic
Built ca. 1910; rehabilitated 1999

Crooked Creek Bridge
Through truss bridge over Crooked Creek on CR 202, 4.5 mi. east of Nortonville
Open to traffic
Built ca. 1910

Delaware River Bridge
Pratt through truss bridge over Delaware River on abandoned road (possible an old alignment of K-4 Highway)
Closed to all traffic

Delaware River Composite Truss Bridge
Through truss bridge over Delaware River on Coal Creek Road at Valley Falls
Open to traffic
Built 1936

Elm Creek Bridge
Pony truss bridge over Elm Creek on CR 21, 0.4 mi. north and 7.5 mi. west of Perry
Open to traffic
Built ca. 1930

Half Mound Bridge
Through truss over Delaware River on FAS 1325 near Half Mound
Removed and replaced by new bridge on new alignment
Purchased from a company in Nebraska and erected by Jefferson County in 1935. Replaced by a new bridge in 1983.

Muddy Creek Bridge
Pony truss bridge over Muddy Creek, 6.4 mi. south and 0.6 mi. east of Meriden
Open to traffic
Built ca. 1930

North Cedar Creek Bridge
Pony truss bridge over North Cedar Creek on CR 178, 1.4 mi. north and 6.5 mi. west of Valley Fall
Open to traffic
Built ca. 1910

North Fork Walnut Creek Bridge
Lost pony truss bridge over North Fork Walnut Creek on Jackson Road, 4.4 mi. north and 2.0 mi. east of Valley Falls
No longer exists
Built ca. 1910; replaced 2003

Old Jefferson Town Bowstring Bridge
Bowstring pony truss bridge over Unnamed creek
Open to pedestrians
Relocated to Old Jefferson Town in Oskaloosa, Kansas. Added to the National Register of Historic Places in 1990.

Old Jefferson Town Bowstring Bridge
Bowstring pony truss bridge over Unnamed creek
Open to pedestrians
Built by the King Iron Bridge & Mfg Co. of Cleveland, Ohio. Relocated to Old Jefferson Town in Oskaloosa, Kansas. Added to the National Register of Historic Places in 1990.

Perry Bridge
Through truss bridge over Delaware River on Bridge Street (Old US 24) just west of Perry in Perry
Open to two-lane traffic
Built 1926 by the Midland Bridge Co.

Perry Railroad Bridge
Two-span skewed through truss railroad bridge over the Delaware River just west of Perry
Open to two-track railroad traffic

Rock Creek Bridge
Lost pony truss bridge over Rock Creek on 122nd Road
No longer exists
Replaced 2003

Rock Creek Bridge
Rainbow arch bridge over Rock Creek
Open to traffic
Built 1926

Slough Creek Bridge
Pony truss bridge over Slough Creek on McCall Drive, 1.9 mi. north of Oskaloosa
Open to traffic
Built 1923

Wild Horse Creek Bridge
Pony truss bridge over Wild Horse Creek on CR 39, 3.0 mi. north and 0.8 mi. east of Perry
Open to traffic
Built ca. 1920