List of auto trails
 | Atlantic–Yellowstone–Pacific Highway National route. Analogous to Iowa Highway 9, U.S. Route 71, U.S. Route 18, U.S. Route 218, and U.S. Route 20 |
| Black Diamond Trail Marshalltown to Cedar Falls Roughly analogous to Iowa Highway 14 and U.S. Route 20 |
| Black Hawk Trail Davenport to Davenport |
| Black Hills Highway National Route. Analogous to U.S. Route 18 |
| Blue Grass Route Council Bluffs to Burlington Counties: Adams 'Analogous to U.S. Route 34 |
| Blue J Highway Lineville to Des Moines Roughly analogous to U.S. Route 65 and Iowa Highway 14 |
| Burlington Way Burlington to Cresco Roughly analogous to U.S. Route 61, Iowa Highway 70, U.S. Route 218, Iowa Highway 150, and U.S. Route 63 |
| Capitol Highway Lineville to Des Moines Analogous to U.S. Route 69 |
| Cedar Rapids, Ottumwa, and McGregor Trail Ottumwa to McGregor Also known as the Park Highway. Analogous to Iowa Highway 149 and U.S. Route 151 |
| Cedar Rapids, Urbana–Independence Short Line Cedar Rapids to Independence Roughly analogous to Iowa Highway 150 |
| Center Point Motor Club Cedar Rapids to St. Paul, Minn. Roughly analogous to Iowa Highway 150 and U.S. Route 63 |
| Chariton and Leon Short Line Leon to Chariton Analogous to U.S. Route 69 and U.S. Route 34 |
| Custer Battlefield Highway Omaha, Nebr. to Glacier National Park Analogous to Interstate 29 and Iowa Highway 12 |
| Daniel Boone Trail St. Louis, Mo. to St. Paul, Minn. Counties: Boone Analogous to U.S. Route 63, Iowa Highway 163, Iowa Highway 415, Iowa Highway 17, U.S. Route 30, and U.S. Route 169 |
| Denison – Sioux City Cut-Off Denison to Sioux City |
| Detroit, Lincoln, and Denver Highway Denver, Colo. to Detroit, Mich. |
| Diagonal Trail Davenport to Lake Park |
| Diamond Trail Des Moines to Iowa City Counties: Benton |
| Eldora – State Center and Colfax Highway Colfax to Eldora |
| Everett Powers Highway Des Moines to Knoxville |
| Farmers Highway Exira to Greenfield |
| Glacier Trail St. Louis, Mo. to Glacier National Park |
| Golden Rod Highway Nebraska City, Nebr. to Bedford |
| Grand Line Lamoni to Hopeville |
| Great White Way Council Bluffs to Davenport Counties: Adair Current routes: U.S. Route 6 |
| Green Crescent Muscatine to Cedar Rapids |
| Hamlin Short Route Elk Horn to Guthrie Center |
| Harding Highway Los Angeles, Calif. to Washington, D.C. |
| Hawkeye Cut-Off Sioux City to Fort Dodge |
| Hawkeye Highway Sioux City to Dubuque Counties: Black Hawk Current routes: U.S. Route 20, U.S. Route 218 |
| Herbert Hoover Highway Iowa City to Lowden |
| Imperial Highway Sioux Falls, S. Dak. to Lansing |
| Indian Trail Tama to Eldora |
| I.O.A. Short Line Council Bluffs to Davenport |
 | Jefferson Highway New Orleans, La. to Winnipeg, Man. |
| John D. Parmalee Trail Des Moines to Pleasantville |
| King's Highway Cedar Rapids to Davenport |
| Lincoln Hawkeye Pike Clinton to West Union |
 | Lincoln Highway San Francisco, Calif. to New York, N.Y. |
| Lineville–Indianola Short Line Lineville to Indianola |
| Marshalltown–Colfax Short Line Colfax to Marshalltown |
| Marysville–Carroll Trail (M.C. Trail) Maryville, Mo. to Carroll |
| Mississippi Valley Highway Louisiana to Minnesota Followed the same route as the Burlington Way. |
| Muscatine – Des Moines Short Line Des Moines to Muscatine |
| National Parks Pike Yellowstone National Park to Madison, Wis. |
| Okoboji Trail Des Moines to Arnolds Park |
| Old Military Trail Charles City to McGregor |
| Perry Pike Guthrie Center to Ogden |
| Pershing Way New Orleans, La. to Winnipeg, Man. |
| Rainbow Trail Hawarden to Dubuque |
| Red Ball Route St. Louis, Mo. to St. Paul, Minn. |
| Red Line Route Missouri state line to Villisca |
| Red X Route— 87 miles (140 km) Iowa City to Dubuque Current routes: Iowa Highway 1 and U.S. Route 151 Passed through Iowa City, Mount Vernon, Anamosa, Monticello, and Dubuque |
| River to River Route Council Bluffs to Davenport Counties: Audubon |
| Southwest Trails Kansas City, Mo. to Chicago, Ill. Counties: Appanoose Current routes: Iowa Highway 5 |
| Star Route Osceola to Des Moines |
| Tall Corn Route Sioux City to McGregor |
| Tourists Route Mount Ayr to Des Moines |
| Washington Highway Seattle, Wash. to Washington, D.C. |
| Waubonsie Trail Nebraska City, Nebr. to Keokuk |
| Webster Trail Keokuk to Mt. Pleasant |
| Whiteway–7–Highway Omaha, Nebr. to Chicago, Ill. |
| Wilson Highway Missouri state line to Emmons, Minn. |
| Woodward–Ogden Cut-Off Des Moines to Ogden |