| State: | IA |
| Type: | IA |
| Route: | 182 |
| Map Custom: | yes |
| Map Notes: | Iowa 182 highlighted in red |
| Length Mi: | 9.051 |
| History: | 1930–1968: known as Iowa 26 |
| Direction A: | South |
| Terminus A: | at Inwood |
| Direction B: | North |
| Terminus B: | near Larchwood |
| Counties: | Lyon |
| Previous Type: | IA |
| Previous Route: | 175 |
| Next Type: | IA |
| Next Route: | 183 |
Iowa Highway 182 (Iowa 182) is a 9adj=midNaNadj=mid state highway in the northwestern corner of Iowa. It begins at U.S. Highway 18 (US 18) in Inwood and ends at Iowa 9 southeast of Larchwood. The highway has been in the primary highway system since 1930, when it was known as Iowa 26. On January 1, 1969, Iowa 26 and Iowa 182 swapped designations.
Iowa Highway 182 begins at an intersection with US 18 and County Road A42 (CR A42). At the intersection, eastbound US 18 approaches from the west, eastbound US 18 approaches from the south, and CR A42 approaches from the east. Iowa 182 travels north through Inwood for 1miles and continues due north through the farmland of Lyon County for 8miles to an intersection with Iowa Highway 9. The intersection with Iowa 9 is very similar to the intersection with US 18; eastbound Iowa 9 approaches from the north and westbound Iowa 9 approaches from the east.[1]
Between 1930 and 1968, the highway now known as Iowa 182 was called Iowa 26. This was the second instance of Iowa 26. The first was designated in 1920 with the rest of the primary highway system. It was originally a spur route from Primary Road No. 19 (now US 18) to Rock Valley.[2] Iowa 26 was extended north from Rock Valley back to US 18 in 1929.[3]
In 1930, US 18 was rerouted in Lyon and Sioux counties. The new routing of US 18 went through Rock Valley, thus eliminating the need for Iowa 26, which had connected Rock Valley to US 18. The Iowa 26 designation was moved northwest. It replaced County Road S, which followed the same course Iowa 182 now follows.[4] [5]
On January 1, 1969, the Iowa State Highway Commission, now known as the Iowa Department of Transportation, renumbered several state highways. The changes to the highway system fixed a number of issues: creating continuous route numbers across state lines, removing duplicate route numbers where they were unnecessary, and extending route numbers in some locations.[6] In this case, the former Iowa 182 in Allamakee County crossed into Minnesota and became Trunk Highway 26.[7] The two routes' numbers were switched and have remained the same since then.[8]