Category:Roads numbered 421

• Signs for roads numbered 421‎ (1 C, 16 F)

A

• A421 road (England)‎ (1 C, 21 F)

B

• Bundesstraße 421‎ (4 F)

E

• E421‎ (4 C, 21 F)

F

• Florida State Road 421‎ (10 F)

G

• G0421 Xuguang Expressway‎ (1 C, 12 F)

M

• Mie Prefectural Road Route 421‎ (1 F)

N

• New York State Route 421‎ (7 F)
• Niigata Prefectural Road Route 421‎ (1 F)

O

• Ohio State Route 421‎ (2 F)

P

• Puerto Rico Highway 421‎ (2 F)

R

• Route 421 (Japan)‎ (2 C, 27 F)
• Route départementale 421 (Allier)‎ (2 F)

S

• South Carolina Highway 421‎ (3 F)
• Strada statale 421 dei Laghi di Molveno e Tenno‎ (1 C, 3 F)

T

• Tennessee State Route 421‎ (1 C, 1 F)
• Tokyo Metropolitan Road Route 421‎ (5 F)

U

• U.S. Route 421‎ (9 C, 1 F)