Iowa Highways: 320 to 339

Jump directly to route:
300-319	320	321	322	323	324	325	326	327	328	329	340-359
300-319	330	331	332	333	334	335	336	337	338	339	340-359

For an explanation of the route listings, click here.

Iowa 320

Designated: June 4, 1935 Decommissioned: 1963
Original western terminus: US 169 in northern Webster County; it was extended westward to replace an old east-west segment of US 169 after the relocated US 169 north of Fort Dodge opened on November 18, 1960.
Original eastern terminus: Badger
Paving history: Unpaved at designation, the road had a bituminous surface at the time of decommissioning (but has since been paved).
Replaced by: County road (now numbered C56)

Iowa 321

Designated: June 4, 1935 Decommissioned: 1963
Original northern terminus: Clare
Original southern terminus: IA 5 (now IA 7) in western Webster County
Paving history: Unpaved at designation, the road remained gravel at decommissioning. Only the east-west segment into Clare has been paved.
Replaced by: County road (now numbered C66) and an unnumbered north-south gravel road (Eastern Avenue in Webster County)

Iowa 322 (I)

Designated: June 4, 1935 Decommissioned: January 1, 1969
Original northern terminus: Rake; in 1949 the north end was moved to the Minnesota state line north of Rake, as the road was straightened that year.
Original southern terminus: IA 9 east of Buffalo Center
Paving history: Unpaved at designation, it was paved in 1955.
Replaced by: IA 254 (II) in a numbering swap

Iowa 322 (II)

Designated: January 1, 1969 Decommissioned: July 1972
Original northern terminus: IA 92 in eastern Cass County
Original southern terminus: Massena
Paving history: The entire road was paved at the time of designation.
Replaced by: City street (Main Street in Massena); this replaced IA 254 (I).

Iowa 322 (III)

Designated: 1981 Decommissioned: July 1, 2003
Original northern terminus: IA 92 west of Winterset
Original southern terminus: Pammel State Park
Paving history: The entire road was paved at the time of designation.
Replaced by: County Road P68. This replaced IA 162.
Terminus photos

Iowa 323

Designated: June 4, 1935 Decommissioned: 1980
Original western terminus: IA 60 (later IA 17) in southwestern Wright County
Original eastern terminus: Woolstock
Paving history: Unpaved at designation, it was paved in 1955.
Replaced by: County Road C70

Iowa 324 (I)

Designated: June 4, 1935 Decommissioned: 1954
Original northern terminus: US 20 east of Sioux City
Original southern terminus: Lawton
Paving history: There were no paved segments.
Replaced by: County road (now numbered K49), after US 20 was re-routed closer to Lawton.

Iowa 324 (II)

Designated: 1956 Decommissioned: July 1, 2003
Original northern terminus: Lewis and Clark State Park
Original southern terminus: IA 175 in western Monona County
Paving history: Unpaved at designation, it was paved in 1967.
Replaced by: Unnumbered county road (name is Park Loop)
Terminus photos

Iowa 325

Designated: June 4, 1935 Decommissioned: July 1, 2003
Original western terminus: Spillville; it was truncated at the east city limits in 1980
Original eastern terminus: US 52 north of Calmar
Paving history: Unpaved at designation, it was paved in 1955.
Replaced by: County Road B16. It was originally designated as a spur from Protivin to US 52, utilizing what is now B16 west of Spillville, but Protivin wanted a direct connection to Cresco instead, so the Highway Commission agreed to truncate 325 at Spillville and extend IA 139 southward a day later. On July 9 the Highway Commission denied Spillville's request to get the Protivin segment back.
Terminus photos

Iowa 326

Designated: June 4, 1935 Decommissioned: 1982
Original northern terminus: Bristow
Original southern terminus: IA 3 in western Butler County
Paving history: Unpaved at designation, it was paved in 1955.
Replaced by: County Road T24
Former terminus photos

Iowa 327

Designated: June 4, 1935 Decommissioned: July 1, 2003
Original northern terminus: Orleans; it was extended to a county road (later numbered A15) north of Orleans on December 10, 1935
Original southern terminus: IA 276 north of Spirit Lake
Paving history: The segment from IA 276 to Orleans was paved at the time of designation, while the segment north of Orleans appeared as a bituminous surface on maps as late as 1991; all maps after 1994 showed it as paved.
Replaced by: Local road (250th Avenue). It was created from part of a former US 71 segment north of Spirit Lake which was part of IA 276 for a short time.
Terminus photos

Iowa 328

Designated: July 10, 1935 Decommissioned: 1980
Original northern terminus: Galva
Original southern terminus: US 20 in northeastern Ida County
Paving history: Unpaved at designation, it was paved in 1937.
Replaced by: County Road M25. The segment inside Galva remained a state highway until 1981.
Former terminus photos

Iowa 329

Designated: July 23, 1935 Decommissioned: 1980
Original western terminus: US 169 at Boxholm
Original eastern terminus: Pilot Mound
Paving history: Unpaved at designation, it was paved in 1959.
Replaced by: County Road E18
Note: This highway was originally numbered IA 328 on June 18, 1935, but the spur to Galva was assigned the same number on July 10. Realizing that there were two highways with the same number, the Highway Commission decided to renumber this spur as IA 329 on July 23.

Iowa 330 (I)

Designated: July 23, 1935 Decommissioned: 1947
Original northern terminus: US 18 in western Chickasaw County
Original southern terminus: Ionia
Paving history: There were no paved segments.
Replaced by: IA 393

	Iowa 330
	Length: 48 miles/77 kilometers Northeastern terminus: IA 14 north of Marshalltown Southwestern terminus: I-80 (exit #142) in Altoona Terminus photos Counties: Polk, Jasper, Story, Marshall Cities along route: Altoona, Bondurant, Albion NHS: Entire route Expressway segments: 35 miles, from the southwestern terminus to US 30 Multiplexes: 15 miles with US 65, from I-80 to the junction with IA 117 northwest of Mingo
	History
	Designated: 1947, to a former segment of US 30 through Marshalltown after US 30 was re-routed to its south Paving history: The entire road was paved at the time of designation. Major alignment changes: January 1, 1969: Extended southwestward along the former IA 64 segment between US 30 and US 65. December 26, 1989: Re-routed around Marshalltown via the former IA 233 and County Road S75. The old route outside of Marshalltown became County Road E41. December 2012: Extended southwestward from IA 117 to I-80 along an existing expressway segment as a second number with US 65. Upgrades: October 10, 2002: 5-mile expressway segment, between a point northeast of Melbourne and US 30, opens November 22, 2002: 15-mile expressway segment between the southwestern terminus and Melbourne opens
	Notes
	This diagonal road in central Iowa was built from Des Moines to Marshalltown in the mid-1930s and was originally signed as IA 88 (I) before becoming part of the cross-state IA 64 in 1939. As a result of the Great Renumbering of 1969, the diagonal had two separate numbers — US 65 and IA 330 — until December of 2012, when IA 330 was extended southwestward to I-80 to give the diagonal expressway a continuous number (similar to what was done with IA 27 and the extended IA 163). The segment from US 30 to IA 14 north of Marshalltown is expected to be upgraded to "Super-2" traffic in the future, although funding has yet to be programmed; the combination of US 20, IA 14, and IA 330 is a commonly-used route between Waterloo/Cedar Falls and Des Moines. According to Jeff Morrison, the north end of IA 330 was temporarily in a different place as a result of a construction project circa 1995: "When IA 14 was detoured between Marshalltown and [County Road] E18 using [US] 30, [IA] 330, [County Road] S75, and E18, the "End 330" was posted at the S75 junction north of Albion. (They did not want anyone going to 14 while it was being rebuilt, and since the destination of 330 is 14 anyway, it met its goal north of Albion.)"

Iowa 331 (I)

Designated: August 6, 1935 Decommissioned: 1967
Original western terminus: Eldridge
Original eastern terminus: US 61 north of Davenport
Paving history: Unpaved at designation, it was paved in 1966 (just before decommissioning).
Replaced by: County road (now numbered F45)

Iowa 331 (II)

Designated: October 10, 2002 Decommissioned: 2005
Original western terminus: A point between I-35 and South 42nd Street in West Des Moines
Original eastern terminus: IA 28 in Des Moines
Replaced by: Local road (Army Post Road)
This was the designation for a former segment of IA 5 in West Des Moines bypassed when the last segment of the freeway opened. The DOT approved transfer of the road to the city on October 14, 2003, but the transfer was not completed until sometime in 2005.

Iowa 332

Designated: August 20, 1935 Decommissioned: 1980
Original northern terminus: IA 9 east of Forest City
Original southern terminus: Pilot Knob State Park
Paving history: Unpaved at designation, the road remained gravel at the time of decommissioning (but has since been paved).
Replaced by: Unnumbered county road (205th Avenue). The Highway Commission originally numbered this road IA 235 on July 10, but that number was given to a spur to Rhodes instead.

	Iowa 333
	Length: 1.6 miles/2.5 kilometers Western terminus: I-29 (exit #1) west of Hamburg Eastern terminus: US 275 in Hamburg Terminus photos Counties: Fremont
	History
	Designated: September 4, 1935, as a spur from US 59 eastward to Northboro Paving history: There were no paved segments at designation. The segment west of US 59 was paved in 1964 and decommissioned after that. The segment between US 59 and the Fremont/Page county line was paved in 1976, six years after it was given to Fremont County, while the segment in Page County remained gravel until it was paved (and subsequently decommissioned) in 1980. The post-1980 segment was entirely paved. Major alignment changes: June 30, 1937: Extended eastward to IA 208 north of Blanchard; the spur to Northboro became IA 343. June 7, 1939: Extended westward from US 59 to US 275 in Hamburg 1942: Extended eastward from IA 208 through College Springs to US 71 south of Shambaugh, following the former IA 84 (I) along the way. 1948: Straightened to run due eastward from US 59 to US 71 north of Braddyville; the segment through College Springs was turned over to Page County. 1951: Realigned, again, to follow the former IA 84 (I) through College Springs. November 1, 1964: Truncated west of US 59 (and signed as County Road J64 after the present-day county road numbering system was adopted), leaving only the segment between US 59 and US 71. 1968: Straightened to run due eastward from US 59 to US 71. The old segments north of College Springs became County Road J52 and Nutmeg Avenue, while the segment between College Springs and relocated IA 333 was the unsigned IA 999 until 1980 (it is now Maple Avenue). 1970: Segment between US 59 and the Fremont/Page county line decommissioned; it became County Road J64. 1980: Extended westward to I-29 at Hamburg, and truncated east of US 59; the segment east of there, which reopened as a paved road on December 6, became County Road J64. This segment ran parallel to the Missouri state line, with only one mile separating the two. It became a state highway as the result of a proposed exchange of roads announced in February — Fremont County would take IA 184 in exchange for an extension of IA 145 and a new connecting road between I-29 and US 275. On June 19, a state appeals board ruled that the DOT had to keep IA 184 while the county could take IA 42, but the board upheld a lower appeals board's ruling that the state also had to take County Road J64 between I-29 and US 275, which it did not want. While the DOT unsuccessfully appealed that ruling, the Fremont County Board of Supervisors passed a resolution on October 29 stating that J64 became the state's responsibility on October 10. (The legal holdup may explain IA 333's absence from the 1981 state transportation map.) July 1, 2003: Truncated east of US 275 in Hamburg. The old segment between US 275 and US 59 became County Road J64 (its pre-1980 designation).

Iowa 334 (I)

Designated: October 16, 1935 Decommissioned: 1980
Original western terminus: US 63 in northern Bremer County
Original eastern terminus: Frederika
Paving history: Unpaved at designation, it was paved on a new alignment in 1955.
Replaced by: County Road C16

Iowa 334 (II)

This designation was given to the former segment of US 34 from Ottumwa through Agency to the junction with IA 16 north of Eldon that was bypassed when a new four-lane segment opened in October 2006. While it appeared as a black line on the 2007 state transportation map, it appeared as a county road on the DOT's Wapello County PDF map dated January 1, 2007, implying a turnover to local jurisdictions.

Iowa 335 (I)

Designated: October 29, 1935 Decommissioned: 1980
Original northern terminus: Dawson
Original southern terminus: IA 141 in northwestern Dallas County
Paving history: Unpaved at designation, it was paved in 1957.
Replaced by: County Road P46

Iowa 335 (II)

This unsigned highway was assigned to the former segment of IA 163 through Otley that was bypassed in 1999; it was turned over to local jurisdictions in 2000.

Iowa 336

Designated: January 21, 1936 Decommissioned: 1980
Original western terminus: IA 150 in southern Buchanan County
Original eastern terminus: Rowley
Paving history: Unpaved at designation, it had a bituminous surface at decommissioning (but has since been paved).
Replaced by: County Road D41

Iowa 337 (I)

Designated: April 14, 1936 Decommissioned: 1980
Original northern terminus: Grafton
Original southern terminus: IA 9 in southeastern Worth County
Paving history: Unpaved at designation, it was paved in 1957.
Replaced by: County Road S62

Iowa 337 (II)

Designated: 2000 Decommissioned: 2001
This unsigned former segment of US 218 between the north end of the Charles City bypass and US 18 in Charles City was designated after the bypass opened in August 2000. It was turned over to local jurisdictions in 2001 but remains signed as part of Business US 218.

Iowa 337 (III)

This was the designation for a former segment of US 151 southwest of Monticello (through the unincorporated town of Langworthy) that was bypassed by an expressway segment in 2003. It was turned over to Jones County by the end of 2004.

Iowa 338

Designated: May 26, 1936 Decommissioned: 1972
Original northern terminus: Bondurant
Original southern terminus: US 65 in eastern Polk County
Paving history: Unpaved at designation, it was paved in 1957.
Replaced by: County Road S14, and part of IA 945 after 1980

Iowa 339

Designated: August 4, 1936 Decommissioned: 2000
Original northern terminus: IA 9 in northeastern Lyon County
Original southern terminus: George
Paving history: Unpaved at designation, it was paved in 1938.
Replaced by: County Road L14, plus local streets (Iowa Avenue and Main Street) in George
Former terminus photos

Previous page: Iowa Highways 300-319
Next page: Iowa Highways 340-359
Back to the Iowa Highways Page