Ohio County Codes

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These codes were established in the mid-1930s and were used through the expiration of the 1976 baseplate in 1981.

Format: County

All numeric: Franklin
A-ZZZ: Franklin
A0A1-Z0Z5: Franklin
AAA1-ZZZ5: Franklin
A1-N7000: Franklin
N7001-P7000: Delaware
P7001-R5000: Marion
R5001-R42999: Morrow
S1-T3000: Knox
T3001-V7000: Licking
V7001-X5000: Fairfield
X5001-Y3000: Pickaway
Y3001-Z2000: Madison
Z2001-Z14400: Union
AA1-QZ999: Cuyahoga
RA1-SF9999: Lake
SG1-TK999: Ashtabula
TL1-TT9999: Geauga
TU1-UH9999: Medina
UJ1-VC999: Wayne
VD1-VQ999: Ashland
VR1-WT999: Richland
WU1-XH999: Crawford
XJ1-XX9999: Huron
XY1-YL9999: Erie
YM1-ZZ9999: Lorain
51A-3000M: Lucas
3001M-2000P: Wood
2001P-3000Q: Ottawa
3001Q-8000R: Sandusky
8001R-6000T: Seneca
6001T-4000U: Wyandot
4001U-15000V: Hancock
15001V-11000W: Henry
11001W-9000X: Defiance
9001X-9500Y: Williams
9501Y-9999Z: Fulton
1AA-999FZ: Hamilton
1GA-999GU: Clermont
1GV-9999HB: Brown
1HC-999HN: Highland
1HP-999HU: Adams
1HV-999JT: Scioto
1JU-9300JX: Pike
1JY-999KM: Ross
1KP-4999KW: Fayette
1KX-999LF: Clinton
1LG-9999LQ: Warren
1LR-9999MZ: Butler
1NA-9999NK: Preble
1NL-9999SG: Montgomery
1SH-999SX: Greene
1SY-9999TY: Clark
1TZ-9999US: Miami
1UT-999VJ: Darke
1VK-999VU: Shelby
1VV-999WD: Champaign
1WE-999WQ: Logan
1WR-999YA: Hardin
1XB-999XM: Auglaise
1XN-9999XX: Mercer
1XY-9999YF: Van Wert

1YG-999ZJ: Allen
1ZK-9999ZT: Putnam
1ZU-999ZZ: Pauling
A1A-E1999R: Summit
E1S-F9500M: Portage
F1N-H9999F: Trumbull
H1G-K8100Z: Mahoning
L1A-M9000D: Columbiana
M1E-Q1999K: Stark
Q1L-Q999P: Holmes
Q1Q-Q999Z: Coshocton
R1A-S999B: Tuscarawas
S1C-S1999H: Carroll
S1J-S999Q: Harrison
S1R-T5999P: Jefferson
T1Q-U999N: Belmont
U1P-U999Z: Guernsey
V1A-W999A: Muskingham
W1B-W999F: Morgan
W1G-W999L: Noble
W1M-W1500Q: Monroe
W1R-X1999G: Washington
X1H-X999W: Athens
X1X-Y999G: Perry
Y1H-Y999N: Hocking
Y1P-Y999R: Vinton
Y1S-Y999Z: Jackson
Z1A-Z999G: Meigs
Z1H-Z999N: Gallia
Z1P-Z5000Z: Lawrence

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© Copyright 1998-2017 David Nicholson. All Rights Reserved.

Last Modified 4/20/1999.