List of highways numbered 172

The following highways are numbered 172:

Canada

 * NB 172.svg New Brunswick Route 172
 * PEI Highway 172.svg Prince Edward Island Route 172
 * qc172.svg Quebec Route 172

Ireland

 * IRL_R172.svg R172 road

Japan

 * Japanese National Route Sign 0172.svg Japan National Route 172

United States
Territories:
 * I-172.svg Interstate 172 (former)
 * I-172.svg Interstate 172
 * Alabama 172.svg Alabama State Route 172
 * Arizona 172.svg Arizona State Route 172 (former)
 * California 172.svg California State Route 172
 * Colorado 172.svg Colorado State Highway 172
 * Connecticut Highway 172.svg Connecticut Route 172
 * Georgia 172.svg Georgia State Route 172
 * Illinois 172.svg Illinois Route 172
 * Elongated circle 172.svg Kentucky Route 172
 * Louisiana 172.svg Louisiana Highway 172
 * MA Route 172.svg Maine State Route 172
 * MD Route 172.svg Maryland Route 172
 * M-172.svg M-172 (Michigan highway) (former)
 * MN-172.svg Minnesota State Highway 172
 * Ellipse sign 172.svg Mississippi Highway 172
 * MO-172.svg Missouri Route 172
 * Nevada 172.svg Nevada State Route 172
 * Ellipse sign 172.svg New Jersey Route 172
 * New Mexico 172.svg New Mexico State Road 172
 * NY-172.svg New York State Route 172
 * NC 172.svg North Carolina Highway 172
 * OH-172.svg Ohio State Route 172
 * PA-172 (1926).svg Pennsylvania Route 172 (former)
 * South Carolina 172.svg South Carolina Highway 172
 * Secondary Tennessee 172.svg Tennessee State Route 172
 * Texas 172.svg Texas State Highway 172
 * Texas Loop 172.svg Texas State Highway Loop 172
 * Texas Spur 172.svg Texas State Highway Spur 172
 * Texas FM 172.svg Farm to Market Road 172 (Texas)
 * Utah SR 172.svg Utah State Route 172
 * Virginia 172.svg Virginia State Route 172
 * WA-172.svg Washington State Route 172
 * WIS 172.svg Wisconsin Highway 172
 * WY-172.svg Wyoming Highway 172
 * PR urban primary 172.svg Puerto Rico Highway 172