Iowa Highways: 30 to 39

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20-29 30 31 32 33 34 35 36 37 38 39 40-49
For an explanation of the route listings, click here.

Iowa 30
Designated: July 1, 1920
Decommissioned: October 16, 1926
Original northern terminus: IA 5 near Remsen
Original southern terminus: IA 23 at Moville
Counties: Plymouth, Woodbury
Paving history: There were no paved segments.
Replaced by: IA 140; number has since been used for US 30
Iowa 31
Length: 38 miles/61 kilometers
Northern terminus: US 59 east of Quimby
Southern terminus: IA 141 at Smithland
Terminus photos

Counties: Cherokee, Ida, Woodbury
Cities along route: Quimby, Washta, Correctionville, Anthon, Oto, Smithland

NHS: The multiplex with US 20
Multiplexes:
  • ¼ mile with US 20 in Correctionville
    		•
    History
    Designated: July 1, 1920, from Cherokee to Smithland
    Paving history: There were no paved segments at the time of designation.
  • 1955: Paved from US 59 to US 20 at Correctionville and from Oto to Smithland
  • 1957: Paved from US 20 to Anthon
  • 1966: Last segment, from Anthon to Oto, paved (on a new alignment)
    • Major alignment changes:
  • November 3, 1924: Truncated north of the junction with IA 21 (I), eliminating a redundant multiplex into Cherokee, after IA 21 was realigned.
  • November 15, 1927: Diagonalized between Correctionville and Washta on a new gravel road; the old route roughly followed present-day County Roads C66 and L36.
  • 1950: Realigned to run eastward from Quimby to US 59 on a new bituminous segment; the old alignment followed present-day County Roads L51, L56, and C44.
  • November 2015: Realigned along the west edge of Correctionville as part of a project to widen US 20 through there.
    		•
    Iowa 32 (I)
    Designated: July 1, 1920
    Decommissioned: October 16, 1926
    Original northern terminus: Cleghorn
    Original southern terminus: IA 5 in western Cherokee County
    Paving history: There were no paved segments.
    Replaced by: IA 145; the number was used for US 32 until its redesignation as US 6 in 1931.
    Iowa 32 (II)
    Designated: May 8, 1934
    Decommissioned: February 1981
    Original northern terminus: IA 9 west of Spirit Lake
    Original southern terminus: US 71 in Milford
    Counties: Dickinson
    Paving history: Unpaved at designation, the road had a bituminous surface before it was paved in 1963.
    Replaced by: IA 86
    Iowa 32 (III)
    Designated: September 1995
    Decommissioned: Early 2021
    Original northern terminus: John F. Kennedy Road in Dubuque; it was extended to the junction of US 52/IA 3 and the former IA 386 in Sageville on September 13, 2002.
    Original southern terminus: US 20 (Dodge Street) in Dubuque
    Counties: Dubuque
    Paving history: The entire road was paved at the time of designation.
    Replaced by: City street (Northwest Arterial) in Dubuque. The Iowa DOT took over a former two-lane city street, which expanded to a four-lane divided highway in 1997 and was extended northeastward five years later. As part of an agreement reached in August 2013 that allowed the DOT to build the Southwest Arterial, the city of Dubuque took over jurisdiction of both the Northwest Arterial and IA 3 within the city of Dubuque after the US 52 Southwest Arterial opened. The segment remains part of the NHS as a non-primary highway.
    Terminus photos
    Iowa 33 (I)
    Designated: July 1, 1920
    Decommissioned: December 1930
    Original northern terminus: Meriden
    Original southern terminus: IA 5 west of Cherokee
    Paving history: There were no paved segments.
    Replaced by: County road (now numbered L51) after a realignment of IA 5 between the IA 143 junction and Cherokee
    Iowa 33 (II)
    Designated: January 1931 (number approved December 10, 1930)
    Decommissioned: January 1, 1969
    Original northern terminus: IA 10 at Alton; an extension to IA 21 (I), now US 59, near Allendorf was approved by the Highway Commission on January 7, 1931. It was pulled back to the eventual junction with IA 9 north of Sibley on December 19, 1933. On January 4, 1938, IA 33 was extended to the Minnesota state line south of Bigelow, MN.
    Original southern terminus: US 75 in Le Mars
    Counties: Osceola, O'Brien, Plymouth, Sioux
    Paving history: There were no paved segments at the time of designation.
  • 1933: Paved from Sibley to IA 21 north of Allendorf (the east-west segment was replaced by IA 9 by the end of the year)
  • 1935: Paved from Carnes (a town south of Orange City that does not appear on the map anymore) to Le Mars
  • 1936: Paved from Alton to Carnes
  • 1937: Paved from Ashton to Sheldon
  • 1938: Paved from IA 9 north of Sibley (including a short multiplex) to Ashton
  • 1939: Paved from Sheldon to Hospers
  • 1940: Last segment, from Hospers to Alton, paved
    • Major alignment changes:
  • October 25, 1932: IA 9 and IA 33 switch routes between Sibley and IA 21 so that IA 9 went straight east from Sibley to Allendorf instead of IA 33. On December 19, 1933, IA 9 was put back on its previous alignment, and IA 33 ended at the eventual junction of IA 9 (even though there was no road at the time) north of Sibley.
  • 1934: Segment between Alton and Sheldon was realigned on a new diagonal road
  • October 29, 1935: Segment from Sheldon to Ashton was diagonalized
  • 1936: Segment from Ashton to Sibley was diagonalized
    • Replaced by: IA 60. It has not been assigned to any road since.
    IA 33 replaced IA 187 (I) between Alton and Hospers, and IA 190 (I) between Sibley and Ashton.
    Iowa 34
    Designated: July 1, 1920
    Decommissioned: October 16, 1926
    Original northern terminus: Nebraska state line at Sioux City
    Original southern terminus: IA 4 in Denison
    Counties: Woodbury, Monona, Crawford
    Paving history: There were no paved segments at designation; in 1923 the segment from Sioux City to a point east of Luton was paved.
    Replaced by: US 20 south of downtown Sioux City (across the Combination Bridge) and IA 141 east of there. The number has since been used for US 34.
    For a map of its 1925 street alignment through Sioux City, see Jeff Morrison's Sioux City Highway Chronology page.
    Iowa 35 (I)
    Designated: July 1, 1920
    Decommissioned: January 1948
    Original western terminus: IA 34 in Mapleton; it was extended to IA 37 near Turin on November 27, 1928
    Original eastern terminus: IA 23 in Rockwell City. It was truncated at IA 17 east of Lake City on November 3, 1924; at US 71 east of Lake View on October 16, 1926; and at US 71 east of Odebolt on April 4, 1935, after 71 was realigned.
    Counties: Monona, Woodbury, Ida, Sac, Calhoun (1920-1924)
    Paving history: There were no paved segments at designation.
  • 1937: Paved from the Woodbury/Ida county line to Battle Creek
  • 1938: Paved from Odebolt to US 71
  • 1939: Paved from Ida Grove to Odebolt
  • 1941: Paved from Battle Creek to Ida Grove; the segments in Monona and Woodbury counties remained unpaved at decommissioning.
    • Replaced by:
  • US 71 (duplicated segment with IA 18 on October 16, 1926)
  • IA 151 (between Auburn and IA 17 on October 16, 1926)
  • IA 175 (at decommissioning)
    		•
    Iowa 35 (II)
    Designated: 1954
    Decommissioned: 1957
    Original northern terminus: US 18
    Original southern terminus: Garner
    Counties: Hancock
    Paving history: The entire road was paved at the time of designation.
    Replaced by: IA 409, to make room for the proposed I-35 in the numbering system. It was designated to serve Garner after US 18 was realigned in this area.
    Iowa 36
    Designated: July 1, 1920
    Decommissioned: July 1, 2003
    Original northern terminus: IA 35 (I), later US 71, west of Lake View
    Original southern terminus: Wall Lake
    Counties: Sac
    Paving history: Unpaved at designation, the road was paved in 1939.
    Replaced by: County Roads M64 (north-south segment) and D59 (short east-west segment)
    Terminus photos
    Iowa 37
    Length: 40 miles/64 kilometers
    Western terminus: IA 175 east of Turin
    Eastern terminus: US 59 east of Earling
    Terminus photos

    Counties: Monona, Crawford, Harrison, Shelby
    Cities along route: Soldier, Dunlap, Earling

    NHS: The multiplex with US 30
    Multiplexes: ¼ mile with US 30 in Dunlap; the two highways run in opposite directions.
    History
    Designated: July 1, 1920, from Onawa to Dunlap
    Paving history: There were no paved segments at the time of designation.
  • 1938: Paved from Onawa to Turin
  • 1958: Paved from Turin to Soldier
  • 1963: Segment from Soldier to Dunlap upgraded from bituminous to paved
  • 1965: Paved from Dunlap to Earling
  • 1968: Last segment, from Earling to US 59, paved. (The extension into Irwin was entirely paved.)
    • Major alignment changes:
  • May 27, 1931: Extended eastward from Dunlap to IA 4 (now US 59), creating a short "wrong-way" duplex with US 30
  • May 11, 1966: Truncated west of Turin, eliminating an overlap with IA 175 that had existed between Onawa and Turin since IA 175 was extended in 1948.
  • July 12, 1971: Extended east of US 59 via the former IA 268 into Irwin
  • August 16, 1982: Segment east of US 59 decommissioned; now signed as County Road F24. (The truncation was shown on the 1981 map, but the legal description notes this as the truncation date.)
    		•
    Iowa 38
    Length: 99 miles/159 kilometers
    Northern terminus: IA 3 east of Edgewood
    Southern terminus: IA 92 in Muscatine
    Terminus photos

    Counties: Delaware, Jones, Cedar, Muscatine
    Cities along route: Greeley, Delaware, Delhi, Hopkinton, Monticello, Olin, Stanwood, Tipton, Wilton, Muscatine

    NHS: From I-80 to the south end in Muscatine
    Multiplexes:
  • 2 miles with IA 64 in southern Jones County
  • 1 mile with US 30 east of Stanwood
  • 4 miles with I-80, from Exit #267 to Exit #271 in Cedar County
  • 5 miles with US 6 south of I-80
  • 2 miles with IA 92 and Business US 61 in Muscatine, from the US 61 bypass to its south end at the IA 92 bridge; this includes a 1.3-mile concurrency with IA 22 north of Washington Street.
    		•
    History
    Designated: July 1, 1920, from Anamosa to Muscatine
    Paving history: There were no paved segments at the time of designation.
  • 1928: Paved from US 30 at Stanwood to Tipton
  • 1933: Paved from US 6 near Wilton Junction (now Wilton) to Muscatine
  • 1938: Paved from US 20 to Delhi and from the Delaware/Jones county line to Monticello. The paved multiplex with IA 64 in Jones County was also added in 1938.
  • 1940: Paved from Hopkinton to the Delaware/Jones county line
  • 1952: Paved from Delhi to Hopkinton
  • 1955: Paved from Center Junction to the eastern split with IA 64 and from Olin to US 30 at Stanwood
  • 1957: Paved from Monticello to Center Junction (on a new alignment between Scotch Grove and Center Junction), from the western split with IA 64 to Olin, and from Tipton to IA 1 (now County Road F44) near Rochester (on a new, straighter alignment)
  • 1960: Last segments, from IA 3 to US 20 (including a new alignment north of Greeley) and from IA 1 to Wilton (including an alignment shift onto the newly-completed I-80), paved.
    • Major alignment changes:
  • 1923: Straightened north of Olin to IA 61 (later 117, now 64)
  • November 3, 1924: Truncated at IA 61, eliminating a redundant multiplex into Anamosa
  • January 6, 1925: Truncated at IA 2 (later US 61), eliminating a redundant multiplex into Muscatine (it would be re-extended into Muscatine by 1936)
  • July 8, 1931: Extended northward to Center Junction
  • October 1, 1935: Segment from Center Junction to IA 117 superseded by IA 113 (I)
  • January 8, 1936: Extended northward to US 161 (now 151) at Monticello, superseding IA 113 (I)
  • May 10, 1938: Extended northward to present north terminus, superseding the rest of IA 113 (I)
  • January 1, 1969: Truncated at the north junction with US 61 in Muscatine; it had previously gone further south to end at IA 92.
  • June 3, 1986: Extended southward from US 61 to IA 92 in Muscatine, at the same time that IA 22 was re-routed around town on the bypass.
  • For maps of its alignments in Muscatine, see Jeff Morrison's Muscatine Highway Chronology page.
    		•
    Iowa 39 (I)
    Designated: July 1, 1920
    Decommissioned: January 1, 1969
    Original western terminus: Mondamin; it was truncated at IA 6 (I), later US 30, northeast of Logan on November 3, 1924.
    Original eastern terminus: IA 7 at Harlan; it was truncated at IA 191 in Portsmouth on August 12, 1959.
    Counties: Harrison, Shelby
    Paving history: There were no paved segments at designation. The segment through Shelby County was paved in 1939; the segment in Harrison County had a bituminous surface at the time of decommissioning.
    Replaced by:
  • IA 127 (in 1924)
  • IA 64 (between Portsmouth and Harlan in 1959)
  • IA 44 (between US 30 and Portsmouth at decommissioning)
    		•
    Iowa 39
    Length: 24 miles/39 kilometers
    Northern terminus: IA 175 at Odebolt
    Southern terminus: US 59 in Denison
    Terminus photos

    Counties: Sac, Crawford
    Cities along route: Odebolt, Kiron, Deloit, Denison

    NHS: The segment in Denison
    History
    Designated: January 1, 1969, to the last remaining segment of IA 4 (I).
    Paving history: The entire road was paved at the time of designation.
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    © 1997-2021 by Jason Hancock / Last updated September 21, 2021