Iowa Highways: 40 to 49

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30-39 40 41 42 43 44 45 46 47 48 49 50-59
For an explanation of the route listings, click here.

Iowa 40 (I)
Designated: July 1, 1920
Decommissioned: October 16, 1926
Original northern terminus: Minnesota state line south of Lyle, MN
Original southern terminus: IA 20 in Keokuk
Counties: Mitchell, Floyd, Chickasaw, Bremer, Black Hawk, Benton, Linn, Johnson, Washington, Henry, Lee
Paving history: There were no paved segments at designation.
  • 1920: Short segment north of La Porte City was paved
  • 1921: Segments from Floyd to Charles City (multiplexed with IA 19 (I), now US 18) and from Vinton to present County Road E26 west of Shellsburg paved
  • 1923: Short segment north of Iowa City (multiplexed with IA 11) paved
  • 1924: Segment from Janesville to La Porte City paved
  • 1925: Segment from La Porte City to the Black Hawk/Benton county line paved. The rest of the road was unpaved at the time of decommissioning.
  • Major alignment changes:
  • 1920: Realigned between St. Ansgar and Osage. The original route between St. Ansgar and Mitchell remains gravel today and retains the Red Ball Road name.
  • July 28, 1924: Straightened between Mount Pleasant and a point north of Donnellson. This created two spurs, IA 125 to serve Salem, and later IA 133 (I) to serve Oakland Mills State Park.
  • Replaced by:
  • US 218 (between Minnesota and IA 6 south of Vinton)
  • US 30 (between the split with IA 40 and Cedar Rapids, duplicate segment with IA 6)
  • US 161 between Cedar Rapids and Keokuk. The whole route eventually became US 218.
  • IA 40 was originally assigned to the Red Ball Route in eastern Iowa.
    Note: State highway maps prior to 1926 showed that IA 5 (I) and IA 40 had run on different alignments between Cedar Falls and Waterloo than US 20 and 218 did, with IA 40 running north of the Cedar River. However, the Highway Commission's Service Bulletin for the fall of 1925 noted that US 218 would replace the entire route of IA 40 north of US 30, but US 218 was routed south of the Cedar River. Waterloo's request to have US 218 run north of the Cedar was denied at a Highway Commission meeting on December 14, 1926; however, it is unknown at this point whether IA 5 and 40 switched routes before the US highways were signed.
    For a map of its street alignment through Waterloo and Cedar Falls in 1925, see Jeff Morrison's Waterloo/Cedar Falls Highway Chronology page.
    For a map of its street alignment through Cedar Rapids in 1926, see the Highways of Cedar Rapids page.
    For a map of its estimated street alignment through Iowa City in 1925, see the Highways of Iowa City page.
    Iowa 40 (II)
    Designated: October 16, 1926
    Decommissioned: July 1, 2003
    Original northern terminus: IA 3 (I), later IA 2, west of Corydon
    Original southern terminus: Allerton
    Counties: Wayne
    Paving history: Unpaved at designation, it had a bituminous surface until it was paved in 1979.
    Replaced by: County Road S26; this replaced a former segment of IA 14.
    Terminus photos
    Iowa 41
    Designated: July 1, 1920
    Decommissioned: July 1, 2003
    Original northern terminus: IA 8 (I), later US 34
    Original southern terminus: Malvern
    Counties: Mills
    Paving history: Unpaved at designation, the road was paved in 1929.
    Replaced by: County Road L63.
    Terminus photos
    Iowa 42
    Designated: July 1, 1920
    Decommissioned: December 19, 1980
    Original western terminus: IA 4, later US 275, south of Sidney
    Original eastern terminus: Riverton
    Counties: Fremont
    Paving history: Unpaved at designation, it had a bituminous surface until it was paved in 1975.
    Replaced by: County Road J46. The piece of IA 42 inside the Riverton city limits remained under state control until December 29, 1980.
    Former terminus photos
    Iowa 43
    Designated: July 1, 1920
    Decommissioned: January 1, 1980
    Original northern terminus: Minnesota state line south of Fairmont, MN; it was truncated at a point two miles east of Ringsted on May 22, 1934.
    Original southern terminus: IA 9 in Armstrong; it was extended southward and westward to Ringsted on January 8, 1931.
    Counties: Emmet
    Paving history: Unpaved at designation, the remaining segment east of Ringsted had a bituminous surface until it was paved in 1975.
    Replaced by:
  • IA 44 (I) (segment between Minnesota and the westward turn near Ringsted in 1933)
  • Local road (Heritage Street in Ringsted) and County Road A34 (at decommissioning)
  • Iowa 44 (I)
    Designated: July 1, 1920
    Decommissioned: January 1, 1969
    Original northern terminus: Rolfe; it was extended to US 18 near Whittemore on October 2, 1928, and to the Minnesota state line along part of IA 43 on May 22, 1934.
    Original southern terminus: IA 10, later IA 3, in eastern Pocahontas County.
    Counties: Emmet (1934-1969), Kossuth, (1928-1969), Palo Alto (1928-1969), Humboldt (1928-1969), Pocahontas
    Paving history: There were no paved segments at designation.
  • 1937: Paved from a point southwest of Whittemore to West Bend (on a new alignment northwest of West Bend; IA 358 was created to connect this segment with US 18).
  • 1946: Paved from Rolfe to IA 3 east of Pocahontas
  • 1958: Paved from Pocahontas County Road U (now C15) to Rolfe
  • 1959: Paved from West Bend to County Road U. The segment from the Minnesota state line to IA 43 east of Ringsted had a bituminous surface at the time of decommissioning.
  • Major alignment change: IA 44 replaced IA 358, which straddled the Palo Alto/Kossuth county line, in 1962. In return IA 358 was given part of old IA 44 into Whittemore.
    Replaced by: IA 15
    Iowa 44
    Length: 105 miles/169 kilometers
    Western terminus: US 30 northeast of Logan
    Eastern terminus: IA 141 in Grimes
    Terminus photos

    Counties: Harrison, Shelby, Audubon, Guthrie, Dallas, Polk
    Cities along route: Portsmouth, Harlan, Kimballton, Guthrie Center, Panora, Dallas Center, Grimes
    History
    Designated: January 1, 1969, along sections of IA 39 (I) (between US 30 and Portsmouth) and IA 64 (from Portsmouth to Grimes)
    Paving history: The entire road was paved at the time of designation except for the segment between US 30 and the Harrison/Shelby county line, which had a bituminous segment until it was paved in 1978.
    Iowa 45
    Designated: July 1, 1920
    Decommissioned: July 1, 2003
    Original western terminus: IA 4 (I), now US 59
    Original eastern terminus: Manilla
    Counties: Crawford
    Paving history: Unpaved at designation, the remaining segment from IA 46 (I) to Manilla was paved in 1938.
    Major alignment change: On November 27, 1928, IA 45 became a north-south spur between IA 46 (I), later IA 141, and Manilla after 46 superseded 45's east-west segment.
    Replaced by: County Road M55 (at decommissioning)
    Terminus photos
    Iowa 46 (I)
    Designated: July 1, 1920
    Decommissioned: April 1, 1941
    Original western terminus: Manning; it was extended westward to IA 4 (now US 59) west of Manning on November 27, 1928, replacing part of IA 45
    Original eastern terminus: Coon Rapids. It was extended eastward to IA 25 at Bayard in 1922; to Bagley on December 1, 1930; and to IA 17 (now IA 144) in Perry on May 27, 1931.
    Counties: Crawford (1928-1941), Carroll, Guthrie (1930-1941), Dallas (1931-1941)
    Paving history: There were no paved segments at designation.
  • 1931: Multiplexed segment with US 71 (southeast of Templeton) paved. The paved segment from Perry to US 169 was also added in 1931.
  • 1933: Paved from Manning to the western split with US 71
  • 1935: Paved from the eastern split with US 71 to Dedham
  • 1938: Paved from US 59 to IA 45 north of Manilla. The rest of the road was unpaved at the time of decommissioning.
  • Major alignment changes:
  • November 1935: An alignment shift onto a new gravel road between Dawson and Perry created IA 335 (I) to serve Dawson.
  • November 24, 1936: An alignment shift between IA 150 (now 4) west of Jamaica and Dawson created IA 342 to serve Jamaica.
  • Replaced by: IA 141
    Iowa 46 (II)
    Designated: August 1942
    Decommissioned: February 1, 1950
    Original northern terminus: IA 90 (on Grand Avenue at the time) in downtown Des Moines
    Original southern terminus: IA 28 (on Army Post Road at the time) in Fort Des Moines, now part of the city of Des Moines
    Counties: Polk
    Paving history: The entire road was paved at the time of designation.
    Replaced by: Local city streets (mostly SW 9th Street, but it followed 9th, Mulberry, and 7th Streets to Clifton Avenue out of downtown). It replaced part of IA 28 after it was realigned.
    For maps of the route, see the Highways of Des Moines page.
    Iowa 46 (III)
    Designated: August 22, 1953
    Decommissioned: December 28, 1998
    Original northern terminus: IA 163 in Des Moines, at the Iowa State Fairgrounds
    Original southern terminus: IA 5 northwest of Carlisle
    Counties: Polk
    Paving history: The entire road was paved at the time of designation.
    Replaced by: City streets (SE 30th Street, Vandalia Road, and SE 43rd Street in Des Moines; Carlisle Road and SE 45th Street in Pleasant Hill; and SE 45th Street in rural Polk County). The old bridge over the Des Moines River was removed in 1998 due to its age and proximity to the new US 65 freeway; cul-de-sacs were built at the ends of the old bridge, and the remaining segments were turned over to the appropriate local jurisdictions. The segments south of Carlisle Road and north of SE 44th Avenue are now closed to public access.
    This incarnation of IA 46 replaced a 7½-mile segment of IA 60 (I) (now IA 5) after it was realigned onto Army Post Road.
    For additional information, see the Highways of Des Moines page.
    Former terminus photos
    Iowa 47 (I)
    Designated: July 1, 1920
    Decommissioned: October 1940
    Original western terminus: Gowrie; it was extended westward to Farnhamville on December 20, 1938
    Original eastern terminus: IA 16 (I) east of Gowrie; it was extended eastward to IA 16 (later US 169) near Harcourt on October 16, 1926, upon IA 16's relocation.
    Counties: Calhoun (1938-1940), Webster
    Paving history: There were no paved segments.
    Replaced by: IA 175
    Iowa 47 (II)
    Designated: June 24, 1941
    Decommissioned: July 1, 1980
    Original western terminus: IA 14
    Original eastern terminus: Allison
    Counties: Butler
    Paving history: Unpaved at designation, it had a bituminous surface until it was paved in 1975 (the first state highway map to show this short road as paved was the 1976 map)
    Replaced by: Local road (7th Street in Allison)
    Note: Maps prior to 1952 did not show this highway, possibly due to its short length; the approval date listed here was mentioned in the legal description.
    Iowa 48
    Length: 48 miles (coincidence, no?)/77 kilometers
    Northern terminus: US 6 west of Lewis
    Southern terminus: US 59 in Shenandoah
    Terminus photos

    Counties: Cass, Montgomery, Page
    Cities along route: Griswold, Elliott, Red Oak, Essex, Shenandoah
    History
    Designated: July 1, 1920, from Red Oak to Shenandoah
    Paving history: There were no paved segments at designation.
  • 1930: Paved from a point east of Essex to Shenandoah
  • 1931: Paved from Red Oak to a point east of Essex
  • 1959: Segment from US 6 to Griswold upgraded from bituminous to paved
  • 1973: Segment from the East Nishnabotna River crossing to Red Oak upgraded from bituminous to paved
  • 1975: Last segment, from Griswold to the East Nishnabotna River crossing, upgraded from bituminous to paved
  • Major alignment changes:
  • January 6, 1925: Truncated at the junction with IA 8 (later US 34) near Red Oak
  • 1926: Extended southward from Shenandoah to the Missouri border
  • 1928: Realigned to run due south and west from Red Oak to Essex, and diagonally southwestward from Essex to Shenandoah
  • March 4, 1930: Extended northward from Red Oak to Griswold
  • July 8, 1931: Extended northward from Griswold to US 32, now US 6
  • November 25, 1931: Segment south of Shenandoah superseded by IA 4 (I) (now US 59).
  • Iowa 49
    Designated: July 1, 1920
    Decommissioned: July 1, 2003
    Original northern terminus: IA 8 (I), later US 34
    Original southern terminus: Lenox; on October 6, 1943, it was extended southward to IA 2 in Bedford, replacing part of IA 344 (I). On May 18, 1979, it was truncated south of the newly-relocated IA 2, removing it from Bedford.
    Counties: Adams, Taylor
    Paving history: There were no paved segments at designation.
  • 1955: Paved from the eastern split with IA 319 west of Conway to Bedford
  • 1960: Paved from Lenox to IA 319
  • 1967: Last segment, from US 34 to Lenox, upgraded from bituminous to paved
    Replaced by: County Roads N64, J23, N52, J35, and N44, in order from US 34 to IA 2.
    Terminus photos

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