Table of Active State Highways

This page lists all of the Interstate, US, and state highways that are currently active in Iowa. More details on each highway can be found by clicking on the appropriate hyperlink.

Unsigned highways are not listed in this table. For state highways decommissioned in 2003, see the Decommissioning Watch page.

Interstate highways
Highway Northern or western end Southern or eastern end Length
(miles)
29 South Dakota state line at Sioux City Missouri state line south of Hamburg 152
35 Minnesota state line south of Albert Lea, MN Missouri state line south of Lamoni 219
74 I-80 (exit #298) in Davenport Illinois state line at Bettendorf 5.4
80 Nebraska state line at Council Bluffs Illinois state line at Le Claire 307
129 Nebraska state line at Sioux City I-29 (exit #144) in Sioux City ¼
235 I-35/80 (exit #123) in West Des Moines I-35/80 (exit #138) north of Des Moines 14
280 I-80 (exit #290) in Davenport Illinois state line at Davenport 10
380 US 218 & Mitchell Avenue in Waterloo I-80 (exit #239) near Coralville 73
480 Nebraska state line at Council Bluffs I-29 (exit #53B) in Council Bluffs ¾
680 Nebraska state line at Omaha, NE I-80 (exit #27) near Neola 29

US highways
Highway Northern or western end Southern or eastern end Length
(miles)
6 Nebraska state line at Council Bluffs Illinois state line at Bettendorf 322
18 South Dakota state line east of Canton, SD Wisconsin state line at Marquette 310
20 Nebraska state line at Sioux City Illinois state line at Dubuque 301
30 Nebraska state line east of Blair, NE Illinois state line at Clinton 331
34 Nebraska state line south of Bellevue, NE Illinois state line at Burlington 269
52 Minnesota state line south of Prosper, MN Illinois state line at Sabula 167
59 Minnesota state line south of Worthington, MN Missouri state line south of Shenandoah 215
61 Wisconsin state line at Dubuque Missouri state line west of Keokuk 195
63 Minnesota state line north of Chester Missouri state line north of Lancaster, MO 236
65 Minnesota state line north of Northwood Missouri state line at Lineville 238
67 US 52 west of Sabula Illinois state line at Davenport 57
69 Minnesota state line south of Emmons, MN Missouri state line south of Lamoni 228
71 Minnesota state line south of Jackson, MN Missouri state line at Braddyville 232
75 Minnesota state line north of Rock Rapids Nebraska state line at Sioux City 80
77 I-29 (exit #148) at Sioux City Nebraska state line at Sioux City 0.4
136 Missouri state line west of Keokuk Illinois state line at Keokuk 3.6
151 Wisconsin state line at Dubuque I-80 (exit #225) south of the Amana Colonies 108
169 Minnesota state line south of Elmore, MN Missouri state line south of Redding 235
218 Minnesota state line at Lyle, MN US 136 in Keokuk 273
275 Nebraska state line at Council Bluffs Missouri state line south of Hamburg 58

State highways
Highway Northern or western end Southern or eastern end Length
(miles)
1 US 151 southwest of Anamosa IA 2 south of Keosauqua 120
2 Nebraska state line east of Nebraska City, NE West city limits of Fort Madison 251
3 South Dakota state line west of Westfield US 61/151 in Dubuque 328
4 Minnesota state line north of Estherville IA 44 in Panora 146
5 I-35 (exit #68) in West Des Moines Missouri state line south of Cincinnati 105
7 IA 3 near Aurelia US 169 on the outskirts of Fort Dodge 74
8 US 63 in Traer US 218 in northwest Benton County 14
9 South Dakota state line southeast of Sioux Falls, SD Wisconsin state line at Lansing 296
10 South Dakota state line north of Hawarden IA 4 east of Havelock 105
12 IA 10 in Hawarden I-29 (exit #151) in Sioux City 39
13 US 52 east of Froelich US 30 south of Bertram 85
14 US 18/Business US 218 in Charles City IA 2 in Corydon 188
15 Minnesota state line south of Fairmont, MN IA 3 east of Pocahontas 64
16 US 34 east of Agency US 61 at Wever 65
17 US 18 east of Wesley IA 141 southeast of Granger 103
21 San Marnan Drive in Waterloo IA 149 west of Hedrick 97
22 IA 22 west of Thornburg Business US 61 in Davenport 98
23 IA 92 in Oskaloosa IA 149 south of Fremont 16
24 US 18/63 west of New Hampton US 52 and IA 150 in Calmar 27
25 US 30 north of Scranton IA 2 at the Taylor/Ringgold county line 103
26 Minnesota state line at New Albin IA 9 in Lansing 11
27 Minnesota state line south of Albert Lea, MN Missouri state line at St. Francisville, MO 282
28 I-35/80 (exit #131) at the Johnston/Urbandale city limits IA 92 at Martensdale 22
31 US 59 east of Quimby IA 141 at Smithland 38
32 US 52/IA 3 near Sageville US 20 in Dubuque 5.1
37 IA 175 east of Turin US 59 east of Earling 40
38 IA 3 west of Edgewood IA 92 in Muscatine 99
39 IA 175 in Odebolt US 59 in Denison 24
44 US 30 northeast of Logan IA 141 in Grimes 105
48 US 6 west of Lewis US 59 in Shenandoah 48
51 IA 9 southwest of Waukon US 18 in Postville 11
56 IA 150 in West Union IA 13 in Elkader 24
57 US 65 northeast of Iowa Falls US 218 in Cedar Falls 44
58 US 218 and IA 57 in Cedar Falls US 63 in Hudson 12
60 Minnesota state line southwest of Bigelow, MN US 75 north of Le Mars 59
62 US 52 in Bellevue IA 64 in Maquoketa 20
64 US 151 in Anamosa Illinois state line at Sabula 64
70 US 6 in West Liberty IA 92 in Columbus Junction 24
76 Minnesota state line south of Eitzen, MN US 18 west of McGregor 49
78 IA 149 east of Martinsburg US 61 east of Morning Sun 59
81 IA 2 in Farmington Missouri state line south of Farmington 2.2
83 US 59 at Avoca IA 148 at Anita 34
85 East city limits of Montezuma IA 21 at Deep River 8.4
86 Minnesota state line northwest of Spirit Lake US 71 north of Milford 13
92 Nebraska state line at Council Bluffs Illinois state line at Muscatine 279
93 US 63 west of Tripoli IA 150 in Fayette 30
96 IA 14 in northern Marshall County US 63 in northern Tama County 17
98 IA 16 north of Douds Leando 1.8
100 County Road W36 near Cedar Rapids US 151/IA 13 in Marion 12
110 IA 7 in Storm Lake US 20 south of Schaller 15
117 US 65 and IA 330 northwest of Mingo IA 163 in Prairie City 18
122 I-35 (exit #194) at Clear Lake East city limits of Mason City 13
127 I-29 (exit #89) west of Mondamin US 30 at Logan 16
128 IA 13 north of Elkader US 52 north of Garnavillo 7
130 IA 38 in Tipton I-80 (exit #292) in Davenport 32
136 US 52 and IA 3 in Luxemburg Illinois state line at Clinton 98
137 US 63 in Eddyville IA 5 in Albia 14
139 Minnesota state line south of Harmony, MN IA 9 east of Cresco 11
140 IA 3 east of Remsen US 20 in Moville 25
141 I-29 (exit #127) west of Sloan I-35/80 (exit #127) on the Grimes/Urbandale border 156
143 IA 10 east of Granville IA 3 south of Marcus 12
144 IA 175 west of Harcourt IA 141 in Perry 34
146 US 30 in Le Grand US 63 in New Sharon 43
148 I-80 (exit #70) north of Anita Missouri state line north of Hopkins, MO 67
149 I-80 (exit #220) at Williamsburg US 34 in Ottumwa 67
150 US 52 and IA 24 in Calmar US 218 in Vinton 85
160 IA 415 in Ankeny I-35 (exit #90) in Ankeny 2.4
163 US 69 in Des Moines Iowa/Illinois state line at Burlington 166
165 Nebraska state line at Carter Lake Nebraska state line at Carter Lake 0.5
173 IA 44 in Kimballton IA 83 northwest of Atlantic 15
175 Nebraska state line east of Decatur, NE US 63 south of Hudson 221
182 IA 9 south of Larchwood US 18 in Inwood 9.1
183 IA 141 in Ute IA 127 east of Mondamin 31
187 IA 150 south of Fayette US 20 west of Masonville 28
188 IA 3 south of Clarksville US 63 in northern Bremer County 24
191 IA 37 in Earling I-680 (exit #28) north of Neola 23
192 I-29 (exit #56) in Council Bluffs I-29/80 (exit #3) in Council Bluffs 5.2
202 IA 2 north of Moulton Missouri state line north of Coatsville, MO 10.5
210 IA 141 south of Woodward US 65 south of Collins 35
212 IA 21 south of Belle Plaine US 6 in Marengo 12
220 US 6 in South Amana US 151 in (Main) Amana 7.2
224 IA 14 in northeastern Jasper County I-80 (exit #173) south of Kellogg 10.5
281 East city limits of Waterloo IA 150 south of Oelwein 28
316 East city limits of Runnells IA 5 on the Warren/Marion county line 5.8
330 IA 14 north of Marshalltown I-80 (exit #142) in Altoona 48
333 I-29 (exit #1) west of Hamburg US 275 in Hamburg 1.6
346 US 218 at Nashua US 63 and US 18 south of New Hampton 12
415 IA 141 southeast of Granger US 6 in Des Moines 17
471 US 20/71 north of Early IA 175 between Odebolt and Lake View 11

Highway Superlatives

Since Iowa is longer east-west than it is north-south, I have made separate lists for the ten longest highways (since a top ten list for all highways would be dominated by east-west roads). I have also included a top ten list of intrastate highways, which are highways that have both of their ends in Iowa; this list does not include any highways that cross over into other states, regardless of whether they keep their numbers or not.

 Longest east-west 
highways
1. US 30 331 miles
2. IA 3 328 miles
3. US 6 322 miles
4. US 18 310 miles
5. I-80 307 miles
6. US 20 301 miles
7. IA 9 296 miles
8. IA 92 279 miles
9. US 34 271 miles
10. IA 2 258 miles
 Longest north-south 
highways
1. IA 27 282 miles
2. US 218 273 miles
3. US 65 238 miles
4. US 63 236 miles
5. US 169 235 miles
6. US 71 232 miles
7. US 69 228 miles
8. I-35 219 miles
9. US 59 215 miles
10. US 61 197 miles
 Longest intrastate 
highways
1. IA 14 188 miles
2. IA 163 166 miles
3. IA 141 156 miles
4. IA 1 120 miles
5. IA 44 105 miles
6. IA 25 103.4 miles
7. IA 17 102.9 miles
8. IA 38 99 miles
9. IA 22 98 miles
10. IA 21 97 miles

Nine of the ten longest east-west highways are border-to-border highways; IA 3 comes close to the Wisconsin and Illinois borders but it doesn't cross either one. All of the longest north-south highways run from the Minnesota border to the Missouri border except for US 61, which runs from Wisconsin to Missouri.

Now here are the ten shortest signed highways in Iowa. Since so many state highways were decommissioned on July 1, 2003, I am also including a list of what the ten shortest intrastate highways were before the mass decommissioning. (I-129 and US 77 would have ranked second and third on that list, respectively.)

Lengths are from the 2001 Primary Road Sufficiency Log and are given to the nearest hundredth if they are less than one mile long.

 Shortest state highways 
(current)
1. I-129 0.28 miles
2. US 77 0.42 miles
3. IA 165 0.46 miles
4. I-480 0.75 miles
5. IA 333 1.6 miles
6. IA 98 1.8 miles
7. IA 160 2.4 miles
8. US 136 3.6 miles
9. IA 32 5.1 miles
10. IA 192 5.2 miles
 Shortest intrastate highways 
(before July 1, 2003)
1. IA 405 0.25 miles
2. IA 165 0.46 miles
3. IA 403 0.47 miles
4.(tie) IA 239 0.51 miles
4.(tie) IA 324 0.51 miles
6. IA 243 0.56 miles
7. IA 252 0.59 miles
8. IA 249 0.66 miles
9. IA 371 0.72 miles
10. IA 244 0.77 miles

IA 165 became the shortest intrastate highway after IA 405 was decommissioned. I-129, US 77, and I-480 are significantly longer in Nebraska.

Back to the Iowa Highways Page


© 2003-2017 by Jason Hancock / Last updated February 28, 2017