Length: 59 miles/95 kilometers
Northern terminus: Nebraska state line (Missouri
River) at Council Bluffs with IA 92
Southern terminus: Missouri state line near Hamburg
Counties: Pottawattamie, Mills, Fremont
Cities along route: Council Bluffs, Glenwood, Tabor, Sidney,
Freeway segments: None aside from the 12-mile duplex with I-29 south of Council Bluffs
Expressway segments: Six of the eight miles it shares with US 34 in the Glenwood area
5½ miles with IA 92, from the Nebraska state line to I-29 in Council Bluffs; US 275 and NE 92 are together for an additional 20 miles in Nebraska.
12 miles with I-29, from exit #47 in Council Bluffs to exit #35 west of Glenwood
8 miles with US 34 between I-29 and a point east of Glenwood
5 miles with IA 2 east and south of Sidney
Designated: November 2, 1931, along parts of US 34 (from Council Bluffs to Glenwood) and IA 4 (I) (from Glenwood to the Missouri line).
US 34 and 275 shared about 18 miles of the route until US 34 was re-routed away from the Omaha/Council Bluffs area in 1935.
Paving history: The entire road was paved at the time of designation.
Major alignment changes:
1939: Extended from Council Bluffs into Omaha on the Ak-Sar-Ben Bridge, sharing the bridge with US 6, US 30A, US 75, and IA 92.
July 1, 1941: Routed away from the Ak-Sar-Ben Bridge and West Broadway in Council Bluffs onto the South Omaha Bridge (later known as the Veterans Memorial Bridge) and the former IA 367.
The old segment into downtown Council Bluffs became IA 375.
July 1, 2003: Re-routed onto I-29 and US 34 between the split with IA 92 (I-29 exit #47)
and Glenwood, extending the multiplex with US 34 and creating one with I-29. The standalone
segment between Council Bluffs and Glenwood became County Road L35. (The segment from IA 92 to the south city limits of Council Bluffs had been turned over to the city on October 20, 1981, but it remained a part of US 275 until the 2003 reroute.)
September 2006: Two-lane bypass to the east of Sidney opens (part of which is multiplexed with IA 2)
For street alignment changes in Council Bluffs, see Jeff Morrison's Council Bluffs/Omaha Highway Chronology page.
May 24, 1974: Expressway segment near Glenwood (with US 34) opens. (The segment opened to two lanes on January 26.)
May 28, 2010: New four-lane Veterans Memorial Bridge between Omaha and Council Bluffs opens, replacing the old two-lane bridge that had existed since 1935