Oklahoma/Counties

Glossary

OKSL: Oklahoma Section Line Numbering. Beginning in the NW corner of the state, each section line is numbered, EW 1, NS 1. Many counties base county road numbering off of these numbers.

OKSL0: OKSL plus 0. i.e. EW 89 becomes 890. (examples used below: [NSEW] OKSL0 Rd = E 890 Rd). Some counties will omit the 4di number, causing NS 435 to become N 350 Rd and will be designated OKSL0-4.

[NSEW]: Single letter directional identifier (i.e. N or S or E or W). May omit directions if never signed (NSE omits W if there is never a West directional signed.)

[NS/EW]: Two letter directional identifier (i.e. EW 43 or NS 120)

[ord]: Ordinal (the 'st', 'nd', 'rd', or 'th' that follows a number)

FC: Functional Classification

Common Questions Regarding County Naming/Functional Classification

Q: A county road that is dirt is marked primary. Which do I use, Dirt Road or Primary?
A: Primary. Be sure to mark the road as Unpaved as well to prevent routing to those that don't wish to be routed down an unpaved road.

Q: I believe a road should be higher than the Functional Classification. Can I raise it?
A: Yes, please send a PM/Slack DM to a State Manager to let them know. If we were to see it higher without explanation, we may change it back.

Q: I believe a road should be lower than its Functional Classification. Can I lower it?
A: No. This is per the US Functional Classification policy. Lowering a FC requires approval from a RC. Should you feel it has a valid case, please submit a permalink to a state manager.

County Listing

County	Naming Scheme	Speed Limit	Resources
Adair	[NE] OKSL0 Rd
Alfalfa
Atoka
Beaver	[NE] OKSL
Beckham	[NE] OKSL0
Blaine	[NE] OKSL0 Rd
Bryan
Caddo	CR-OKSL0 (For E/W), CS-OKSL0 (For N/S) Need to verify with county
Canadian
Carter
Cherokee	[NSEW] OKSL0-4 Rd
Choctaw
Cimarron	EW] OKSL
Cleveland			County Assessor GIS Norman Base Map
Coal
Comanche
Cotton
Craig	[NSEW] OKSL0 Rd		County Assessor Map
Creek	Tulsa City Numbering [EW] xxx[ord] St [NS] [NS] xxx[ord] [EW] Ave
Custer
Delaware			County GIS
Dewey
Ellis	[NS/EW] OKSL
Garfield
Garvin	CR-[OKSL0]
Grady
Grant
Greer
Harmon
Harper	[NS/EW] OKSL Rd
Haskell
Hughes
Jackson
Jefferson
Johnston
Kay
Kingfisher
Kiowa
Latimer
LeFlore
Lincoln
Logan		45	County Assessor Map
Love
McClain
McCurtain
McIntosh	[NSEW] OKSL0-4 Rd		County Assessor Map
Major	[NS/EW] Example: NS 240
Marshall
Mayes	[NSEW] OKSL0-4 Rd
Murray
Muskogee	[NSEW] xxx[ord] St [NSEW] (base numbers extending from Muskogee).	45
Noble			County Assessor Map
Nowata	[NS/EW] OKSL
Okfuskee	[NE] OKSL0 Rd
Oklahoma	Oklahoma City based numbering/naming. Diagonal Direction (NW/NE, etc.), with exception of Norman/Moore rural areas are based off of respective cities.		OKC.gov Base Map OKC.gov address database
Okmulgee	[NS] xxx Rd. Does not follow OKSL, but uses same format. SL numbering starts at NW corner of Okmulgee County starting with 100.
Osage	CR-xxxx
Ottawa			County Assessor Map
Pawnee
Payne	Most county roads are named or numbered based from Stillwater. EW/NS OKSL numbers also appear on signs or if not named
Pittsburg	[NSEW] OKSL0 Rd		County Assessor Map
Pontotoc
Pottawatomie	CR-[OKSL0]		County Assessor Map
Pushmataha
Roger Mills
Rogers	[NSEW] OKSL0 Rd		County Assessor Map
Seminole			County Assessor Map
Sequoyah	[NSEW] OKSL0-4 Rd
Stephens
Texas	EW: Mile 99, NS: Rd X. Numbers start at western county line with 1, letters start with northern county line with A.
Tillman
Tulsa	Tulsa City Numbering [EW] xxx[ord] St [NS] [NS] xxx[ord] [EW] Ave		County Assessor Map Broken Arrow City GIS Map Tulsa City Neighborhood Association Map
Wagoner	West of Tullahassee, South of Verdigris River: Tulsa City Numbering (E xxx[ord] St S/S xxx[ord] E Ave) East of Tullahassee extending south of E 110th St N: Muskogee City Numbering ([NWE] xxx[ord] St [NWE]) All other sections of county use the [NSEW] OKSL0-4 Rd format	45	County Assessor Map
Washington	[NSEW] OKSL00 Rd		County Assessor Map
Washita
Woods
Woodward	[NS/EW] OKSL