Douglas County, Kansas, maintains an extensive network of county highways to serve the rural areas and state parks of the county. It is one of a handful of Kansas counties to do so.
The major county highways are set up on a grid. East–west-oriented roads have a three-digit number beginning with the numeral "4" and ending in an even digit. The further north the road, the lower the number; the further south, the higher the number. North–south-oriented roads have a four-digit number beginning with "10" and ending in an odd digit. The further west the road, the lower the number; the further east, the higher the number.
There are also minor county roads with one or two digits that travel a short distance or serve a state park.
None of the county highways enters Lawrence, the county seat.
The maximum speed limit on all county highways in Douglas County is 55mph.
| Highway | Western terminus | Eastern terminus | Notes | |
|---|---|---|---|---|
| 3 mi. south of Lecompton; road continues as CR 1029 north | Lawrence city limits a half mile north of the intersection of Kasold Drive and Peterson Road | Part of the "Farmer's Turnpike" between Lawrence and Lecompton | ||
| (west) | Shawnee County line; road continues as SE 45th Street | three miles west of Lawrence | Known to locals as "Stull Road" as it passes through Stull | |
| (east) | Intersection of Noria Road/East 1750 Road near the East Hills Business Park | Johnson County line; road continues as W. 103rd Street en route to DeSoto | Former alignment of K-10 | |
| Shawnee County Line; road continues as SE 89th Street | Johnson County Line; road continues as W. 150th Street en route to Olathe. | |||
| Osage County Line; road continues as E. 133rd Street | Johnson County Line; road continues as W. 159th Street | |||
| at Douglas-Franklin County Line | at Douglas-Franklin County Line | This highway runs along the Douglas-Franklin County Line |
| Highway | Southern terminus | Northern terminus | Notes | |
|---|---|---|---|---|
| Franklin County Line; road continues as Florida Terrace | in Lecompton | |||
| (north) | about 1 mi. north of Clinton Lake | Jefferson County Line; road continues across Kansas River as Lecompton Road en route to Perry | ||
| (south) | Franklin County Line | near Clinton Lake | ||
| Franklin County Line | near Clinton Lake | |||
| (north) | in Midland, 2 miles north of Lawrence | Jefferson County line; road continues north to McLouth | ||
| (south) | Franklin County Line, road continues as Old Highway 59 | , 2 miles south of Lawrence | Former alignment of US-59. | |
| Franklin County Line 3 mi. south of Baldwin City; road continues as Ohio Road. | in southeast Lawrence; road continues northward as Haskell Avenue | |||
| east of Vinland | less than a mile north of interchange with K-10 | |||
| Franklin County line; road continues as Vermont Road en route to becoming 1st Street in Wellsville | Leavenworth County line at Kansas River north of Eudora; road continues as Leavenworth County Highway 1 en route to a junction with the Kansas Turnpike and Tonganoxie |
| Highway | Western or Southern terminus | Eastern or Northern terminus | Notes | |
|---|---|---|---|---|
| at Lone Star Lake | near Clinton Lake | |||
| southeast of Lone Star Lake | north of Lone Star Lake | |||
| southwest of Lone Star Lake | north of Lone Star Lake | |||
| south of Lone Star Lake | Lone Star Lake | |||
| in western Douglas County | West side of Clinton Lake | |||
| southeast of Lone Star Lake | east of Lone Star Lake | |||
| west of Clinton | North side of Clinton | |||
| north of the junction with CRs 4 and 6 | Clinton cemetery | |||
| N 200 Road and E 750 Road | between Globe and Worden | |||
| southwest of Clinton | In Clinton | |||
| northwest of Lawrence | In Lake View | |||
| In North Lawrence, continues as North 7th Street. | near Lawrence Municipal Airport | |||
| in SW Douglas County | north of Lone Star Lake | |||
| High Street / Lawrence Street in Baldwin City | just outside Baldwin City | Part of original route of US-50 | ||
| on the north side of Baldwin City | NW side of Douglas County Lake | |||
| High Street / First Street in Baldwin City | on the east side of Baldwin City | Part of original route of US-50 |