- Ohio Department of Transportation (ODOT)
- TIMS (Functional Classification maps for entire state)
- Click icon with four horizonal lines on top left ("layers" menu)
- Below map, select Roadway Information -> Functional Class
- Color maps by county
County GIS resources
(1) = Download Only
(2) = Lookup by address only
(3) = Being developed
A-C
- Adams 3
- Allen
- Ashland 3
- Ashtabula
- Athens
- Auglaize
- Belmont
- Brown
- Butler
- Carroll
- Champaign (IE Only)
- Clark
- Clermont
- Clinton
- Columbiana
- Coshocton
- Crawford
- Cuyahoga
D-F
G-I
- Gallia
- Geauga
- Greene
- Guernsey 3
- Hamilton
- Hancock
- Hardin
- Harrison
- Henry
- Highland
- Hocking 1
- Holmes 1
- Huron
J-L
M-O
- Madison
- Mahoning
- Marion
- Medina 2
- Meigs 2
- Mercer
- Miami 2
- Monroe
- Montgomery (not interactive, static map)
- Morgan
- Morrow 1
- Muskingum
- Noble
- Ottawa
P-S
- Paulding 2
- Perry 2
- Pickaway
- Pike
- Portage 3
- Preble
- Putnam
- Richland 1
- Ross
- Sandusky
- Scioto 2
- Seneca
- Shelby
- Stark
- Summit
T-V
W-Z