| State: | KS |
| Type: | KS |
| Route: | 39 |
| Map Custom: | yes |
| Map Notes: | K-39 highlighted in red |
| Length Mi: | 65.032 |
| Direction A: | West |
| Terminus A: | north of Fredonia |
| Direction B: | East |
| Terminus B: | southwest of Fort Scott |
| Junction: | |
| Counties: | Wilson, Neosho, Bourbon |
| Previous Type: | K 1926 |
| Previous Route: | 38 |
| Previous Dab: | 1927–1936 |
| Next Type: | US |
| Next Route: | 40 |
K-39 is a 65.03adj=midNaNadj=mid east - west state highway in the U.S. state of Kansas. The highway runs from U.S. Route 400 (US-400) to K-7 southwest of Fort Scott.
K-39 begins 7miles north of Fredonia at U.S. Highway 400 (US-400). It travels east to Benedict, where it turns north toward Buffalo. South of town, K-39 meets US-75 and begins a short, 1miles concurrency with the U.S. Highway. Once leaving US-75, the highway again travels east toward Chanute, where it intersects US-169. The highway continues east 12miles before beginning a 7miles concurrency with US-59. After briefly turning north with US-59, K-39 resumes its easterly route north of Stark. The highway shares a very short overlap with K-3 (less than one mile, 1.6 kilometers) and passes through Hiattville before meeting its eastern terminus at K-7, which completes the connection to US-69.[1]
K-39 has been at its current alignment since 1999.[2] Prior to that the western terminus was located near Elk City. The portion of the route between Elk City and Fredonia are now county owned roads. Before 1956, when K-39 was modernized, a large portion of the route was unpaved and used 90 degree turns to travel northeast instead of the current diagonal alignment.[3]