State Routes That Visit Every County Seat

[oscar]

VA-237 = Fairfax (Fairfax County, independent); Arlington (technically Arlington County)

VA-237 also passes through Falls Church independent city. But while 237 passes through Fairfax County, it misses by several miles its main government center in unincorporated Fair Oaks (there's a smaller one near Fort Belvoir). The county's courthouse is in Fairfax city, but only because the city and county share that courthouse and commonwealth's attorney, much like Arlington and Falls Church have separate government centers but share a courthouse and C.A. located in Arlington.

[hobsini2]

Wis 23 hits 6 of the 8 county seats. Missing Columbia (Portage) and Sauk (Baraboo). Not bad for how long it is at 211 miles.

This is a pretty neat topic.

[TheCatalyst31]

Wis 23 hits 6 of the 8 county seats. Missing Columbia (Portage) and Sauk (Baraboo). Not bad for how long it is at 211 miles.

This is a pretty neat topic.

US 18 is another near miss in Wisconsin. It passes through 6 of 7 county seats, only missing Lancaster in Grant County.

[hbelkins]

If we're doing US routes, then US 460 in Kentucky fits that bill: Frankfort (Franklin), Georgetown (Scott), Paris (Bourbon), Mt. Sterling (Montgomery), Frenchburg (Menifee), West Liberty (Morgan), Salyersville (Magoffin), Paintsville (Johnson), Prestonsburg (Floyd) and Pikeville (Pike).

[Rothman]

If we're doing US routes, then US 460 in Kentucky fits that bill: Frankfort (Franklin), Georgetown (Scott), Paris (Bourbon), Mt. Sterling (Montgomery), Frenchburg (Menifee), West Liberty (Morgan), Salyersville (Magoffin), Paintsville (Johnson), Prestonsburg (Floyd) and Pikeville (Pike).

Meh.  Goes around the Prestonsburg of my youth. ;D

[TheHighwayMan3561]

The flip of this topic may not be as fun, but in MN TH 6 goes to 4 counties and hits no seats.

Since we started doing near-misses, US 71 in MN is 10/12, missing Stearns's seat and clipping the tiniest corner of Itasca County.

[Bickendan]

Oregon:
I-5: Jackson - Medford
Josephine - Grants Pass
Douglas - Roseburg
Lane - Eugene
Linn - Albany
Marion - Salem
Clackamas - Oregon City - missed
Washington - Hillsboro - missed
Multnomah - Portland
7/9

OR 99/99W/99E: Jackson - Medford
Josephine - Grants Pass
Douglas - Roseburg
Lane - Eugene
Polk - Corvallis
Yamhill - McMinnville
Linn - Albany
Marion - Salem
Clackamas - Oregon City
Washington - Hillsboro - missed
Multnomah - Portland
10/11

I-84: Multnomah - Portland
Hood River - Hood River
Wasco - The Dalles
Sherman - Moro - missed
Gilliam - Condon - missed
Morrow - Heppner - missed
Umatilla - Pendleton
Union - La Grande
Baker - Baker City
Malheur - Ontario
7/10
US 30 adds Clatsop - Astoria
Columbia - St Helens
9/12

US 101: Curry - Brookings
Coos - Coos Bay
Douglas - Roseburg - missed
Lane - Eugene - missed
Lincoln - Newport
Tillamook - Tillamook
Clatsop - Astoria
5/7

Not giving this much more thought, so:
OR 238 - Josephine - Grants Pass
Jackson - Medford
2/2

[pderocco]

It works out well if you consider 99E and 99W part of the same road. Gives you two shots at each county seat.