Table of active state highways

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	5½
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	9½
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	320
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	305
30	Nebraska state line east of Blair, NE	Illinois state line at Clinton	331
34	Nebraska state line east of Plattsmouth, NE	Illinois state line at Burlington	265
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	196
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	274
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	Illinois state line at Fort Madison	258
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	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	56
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	275
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	Edgewood Road in Cedar Rapids	US 151/IA 13 in Marion	8.3
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 63 north of Ottumwa	61
150	US 52 and IA 24 in Calmar	US 218 in Vinton	85
152	I-35 (exit #36) north of Osceola	US 69 north of Osceola	1.4
160	IA 415 in Ankeny	I-35 (exit #90) in Ankeny	2.4
163	US 69 in Des Moines	US 63 south of Oskaloosa	61
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
196	US 20 east of Sac City	US 71 east of Lake View	7.8
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	Vandalia Road southeast of Runnells	IA 5 on the Warren/Marion county line	5.2
330	IA 14 north of Marshalltown	US 65 and IA 117 northwest of Mingo	33
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
370	Nebraska state line at Bellevue, NE	I-29 (exit #42) south of Council Bluffs	3.2
415	IA 141 southeast of Granger	US 6 in Des Moines	17

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	320 miles
4. US 18	310 miles
5. I-80	307 miles
6. US 20	305 miles
7. IA 9	296 miles
8. IA 92	275 miles
9. US 34	265 miles
10. IA 2	258 miles

Longest north-south highways
1. IA 27	282 miles
2. US 218	274 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	196 miles

Longest intrastate highways
1. IA 14	188 miles
2. IA 141	156 miles
3. IA 1	120 miles
4. IA 44	105 miles
5. IA 25	103.4 miles
6. IA 17	102.9 miles
7. IA 38	99 miles
8. IA 22	98 miles
9. IA 21	97 miles
10. IA 13	85 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 152	1.4 miles
6. IA 333	1.6 miles
7. IA 98	1.8 miles
8. IA 160	2.4 miles
9. IA 370	3.2 miles
10. US 136	3.6 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