List of County Highways in Douglas County, Kansas

Douglas County, Kansas, keeps many county highways to serve the rural areas and state parks of the county. It is one of a few of Kansas counties to do so.
The major county highways are built on a grid. East–west-oriented roads have a three-digit number beginning with the number "4" and ending in an even number. 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 number. 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 go 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 .