Interstate 35 in Iowa
Iowa's Interstate Highways with I-35 highlighted in red.
|Maintained by Iowa DOT|
|Length:||218.432 mi (351.532 km)|
|Existed:||ca. September 21, 1958 – present|
|History:||Under construction 1958–1975|
|South end:||I-35 towards Kansas City, MO|
| US 34 at Osceola
I-80 near Des Moines
US 30 at Ames
US 20 near Williams
US 18 / Iowa 27 near Mason City
|North end:||I-35 towards Minneapolis-St. Paul, MN|
In the U.S. state of Iowa, Interstate 35 runs north–south through the Des Moines area, parallel to US 65 and US 69. Segments of the Interstate Highway overlap with Interstate 80 and Iowa Highway 27, Iowa's designation for the Avenue of the Saints.
Route description 
Interstate 35 enters from Missouri south of Lamoni at an interchange for U.S. Route 69 (US 69). US 69 is immediately west of the interchange but does not pass beneath I-35. The interstate travels to the north-northeast for 4 miles (6.4 km) where it again meets US 69 east of Lamoni. Near Decatur City, it intersects Iowa Highway 2 (Iowa 2) at a diamond interchange. It continues north for 21 miles (34 km) towards Osceola, passing the small community of Van Wert.
At Osceola, I-35 intersects U.S. Route 34 on the western side of town. From US 34, it heads north, passing Terrible's Lakeside Casino. Northwest of Osceola is the western end of Iowa 152, which connects I-35 and US 69 at a narrow point between the two routes. From here, it travels 20 miles (32 km) through rural Clarke County and Warren County to an interchange with Iowa 92 1⁄3 miles (0.54 km) east of Bevington.
Interstate 35 then turns north to go through Ankeny. It continues north and at Ames meets U.S. Highway 30. Ames is also served by Business Loop 35. I-35 continues north and meets Iowa Highway 175 near Ellsworth and meets the U.S. Highway 20 freeway near Williams. It continues north until the Wright County border, where it turns northeast. On this northeasterly alignment, I-35 meets Iowa Highway 3.
It continues north, enters the Des Moines metropolitan area and meets the Iowa Highway 5 freeway at West Des Moines. Further on in West Des Moines, at the West Mixmaster Interchange, I-35 meets Interstate 80 and Interstate 235. I-235 serves downtown Des Moines, while I-35 and I-80 overlap and serve the western and northern Des Moines suburbs. On the Clive/Urbandale border, I-35 and I-80 meet U.S. Highway 6. Further north in Urbandale, they meet Iowa Highway 141 and turn eastward. They also meet U.S. Highway 69 north of Des Moines. Between Des Moines and Ankeny, at the East Mixmaster interchange, I-35 and I-80 separate at an interchange where they also meet I-235.
Shortly after meeting Iowa Highway 3, Interstate 35 turns north again and meets U.S. Highway 18 and Iowa Highway 27 near Clear Lake. I-35 overlaps U.S. 18 and Iowa Highway 27 through the Clear Lake area, which is also served with Business Loop 35. U.S. 18 separates in Clear Lake and I-35 and Iowa 27, which serves as the designation in Iowa for the Avenue of the Saints, overlap for the rest of the way to the Minnesota border, meeting Iowa Highway 9 near Hanlontown.
The first section of I-35, a 10-mile (16 km) long stretch from Cumming to Urbandale opened around September 21, 1958. Within five years, the interstate had grown to 55 miles (89 km), extending from U.S. Route 34 (US 34) Osceola to the eastern interchange with I-80 and I-235. The next two sections of I-35, 25 miles (40 km) from Ankeny to US 30 near Ames and 30 miles (48 km) from Ames to US 20 near Williams.
By 1972, I-35 was completed at the Missouri and Minnesota state lines. In southern Iowa, the last section, from Iowa 2 near Decatur City to the state line, was completed on December 2, 1970. In northern Iowa, the section from Iowa 9 near Hanlontown to the state line opened on December 12, 1972. The last section of I-35 to open, from US 20 to Mason City, opened on November 14, 1975.
Exit list 
||Colfax Township||I-35 south||Continuation into Missouri|
|Missouri–Iowa state line
||0.000||0.000||114||US 69||Exit number follows Missouri numbering; interchange is on the state line|
||Lamoni||4.169||6.709||4||US 69 – Lamoni, Davis City|
|Decatur City||12.803||20.604||12||Iowa 2 – Leon, Mount Ayr|
|Long Creek Township||17.927||28.851||18||CR J20 – Grand River, Garden Grove|
|Van Wert||22.271||35.842||22||CR J14 – Van Wert|
||Knox Township||29.348||47.231||29||CR H45|
|Osceola||33.164||53.372||33||US 34 – Creston, Osceola|
|34.535||55.579||34||Clay Street – Osceola|
|Osceola Township||36.306||58.429||36||Iowa 152|
||Virginia Township||43.849||70.568||43||CR G76 – New Virginia|
|47.413||76.304||47||CR G64 – Truro|
|Jackson Township||51.948||83.602||52||CR G50 – St. Marys, St. Charles|
|Bevington||56.757||91.342||56||Iowa 92 – Indianola, Winterset|
|Cumming||65.043||104.677||65||CR G14 – Norwalk, Cumming|
||West Des Moines||68.004||109.442||68||Iowa 5 south – West Des Moines, Norwalk, Des Moines International Airport|
|69.153||111.291||69||Grand Avenue – West Des Moines||Signed as exits 69A (east) and 69B (west)|
|70.396||113.291||70||Mills Civic Parkway|
|72.678||116.964||72A||I-235 east – West Des Moines, Des Moines|
|72B||I-80 west – Council Bluffs, Omaha||South end of I-80 overlap|
|73.246||117.878||72C||University Avenue – Clive|
|Clive||74.243||119.483||125||US 6 (Hickman Road) – Adel||Exit numbers follow I-80|
|Urbandale||75.250||121.103||126||Douglas Avenue – Urbandale|
|76.647||123.351||127||Iowa 141 west – Urbandale, Grimes|
|78.623||126.531||129||Northwest 86th Street – Camp Dodge|
|80.631||129.763||131||Iowa 28 south (Merle Hay Road) – Saylorville Lake|
|Saylor Township||84.422||135.864||135||Iowa 415 (2nd Avenue) – Polk City|
|85.670||137.873||136||US 69 (East 14th Street) – Ankeny|
|Ankeny||86.963||139.953||137A||I-235 west – Des Moines|
|87A||I-80 east – Davenport||North end of I-80 overlap|
|88.922||143.106||89||Corporate Woods Drive||Exit numbers follow I-35|
|90.484||145.620||90||Iowa 160 west (Oralabor Road) – Bondurant|
|94||NE 36th Street||Opened November 20, 2012|
|Elkhart Township||96.657||155.554||96||Polk City, Elkhart|
||Huxley||102.620||165.151||102||Iowa 210 – Huxley, Maxwell|
|Ames||111.582||179.574||111||I-35 Bus. north / US 30 – Nevada, Ames, Iowa State University||Signed as exits 111A (east) and 111B (west/north)|
|113.438||182.561||113||I-35 Bus. south / 13th Street – USDA Veterinary Labs|
|Milford Township||116.438||187.389||116||CR E29|
|Howard Township||122.855||197.716||123||CR E18 – Roland, McCallsburg|
|Story City||124.348||200.119||124||Story City|
||Scott Township||127.838||205.735||128||CR D65 – Stanhope, Randall|
|Ellsworth||132.820||213.753||133||Iowa 175 – Jewell, Eldora|
|Rose Grove Township||138.884||223.512||139||CR D41 / CR R61 – Kamrar|
|142.364||229.113||142||US 20 – Waterloo, Fort Dodge||Signed as exits 142A (east) and 142B (west)|
|Williams Township||143.903||231.589||144||CR D25 – Williams, Ellsworth Community College|
||Vernon Township||151.244||243.404||151||CR R75 – Woolstock|
||Morgan Township||159.735||257.069||159||CR C47 – Dows|
|Scott Township||165.538||266.408||165||Iowa 3 – Clarion, Hampton|
|Marion Township||169.991||273.574||170||CR C25 – Alexander|
|Richland Township||176.196||283.560||176||CR C13 – Sheffield, Belmond|
||Pleasant Valley Township||179.820||289.392||180||CR B65 – Thornton|
|182.371||293.498||182||CR B60 – Rockwell, Swaledale|
|Mount Vernon Township||188.415||303.225||188||CR B43 – Burchinal|
|Lake Township||190.643||306.810||190||US 18 east / Iowa 27 east – Charles City, Mason City||South end of US 18/IA 27 overlap|
|Clear Lake||193.092||310.751||193||I-35 Bus. north / CR B35 – Clear Lake, Mason City|
|193.962||312.152||194||US 18 west / I-35 Bus. south / Iowa 122 – Mason City, Clear Lake||North end of US 18 overlap|
|Lincoln Township||197.653||318.092||197||CR B20|
||Danville Township||203.574||327.621||203||Iowa 9 – Manly, Forest City|
|Brookfield Township||208.588||335.690||208||CR A38 – Joice, Kensett|
|Hartland Township||214.608||345.378||214||CR 105 – Lake Mills, Northwood||Former IA 105|
|Iowa–Minnesota state line
||218.432||351.532||Iowa 27 ends||North end of Iowa 27 overlap|
||Freeman Township||I-35 north||Continuation into Minnesota|
See also 
- Iowa Department of Transportation (January 1, 1982). Completion Map of Interstate System (Map). http://www.iowadot.gov/50thpages/pdf/interstatemap.pdf. Retrieved January 11, 2011.
- "2010 Volume of Traffic on the Primary Road System of Iowa" (PDF). Iowa Department of Transportation. January 1, 2010. Retrieved November 16, 2011.
- Iowa Department of Transportation (2011). Transportation Map (Map). http://www.iowadotmaps.com/msp/pdf/current/stmapmain.pdf. Retrieved November 16, 2011.