List of highways numbered 171

Route 171, or Highway 171, may refer to:

Canada

 * PEI_Highway_171.svg Prince Edward Island Route 171
 * Qc171.svg Quebec Route 171

Costa Rica

 * CR RNS 171.svg National Route 171

Ireland

 * IRL_R171.svg R171 road

Israel

 * ISR-HW-171.svg Route 171 (Israel)

Japan

 * Japanese National Route Sign 0171.svg Japan National Route 171

Korea, South

 * Korea Expressway No.171.svg Expressway 171
 * Korea Expressway No.171.svg Osan–Hwaseong Expressway
 * Korea Expressway No.171.svg Yongin–Seoul Expressway

United States

 * US 171.svg U.S. Route 171
 * Alabama 171.svg Alabama State Route 171
 * Arkansas 171.svg Arkansas Highway 171
 * California 171.svg California State Route 171 (former)
 * Connecticut Highway 171.svg Connecticut Route 171
 * Florida 171.svg Florida State Road 171 (former)
 * Georgia 171.svg Georgia State Route 171
 * Illinois 171.svg Illinois Route 171
 * K-171.svg K-171 (Kansas highway)
 * Elongated circle 171.svg Kentucky Route 171
 * MA Route 171.svg Maine State Route 171
 * MD Route 171.svg Maryland Route 171
 * M-171.svg M-171 (Michigan highway)
 * MN-171.svg Minnesota State Highway 171
 * MO-171.svg Missouri Route 171
 * Nevada 171.svg Nevada State Route 171
 * NH Route 171.svg New Hampshire Route 171
 * Ellipse sign 171.svg New Jersey Route 171
 * New Mexico 171.svg New Mexico State Road 171
 * NY-171.svg New York State Route 171
 * NC 171.svg North Carolina Highway 171
 * OH-171.svg Ohio State Route 171
 * Oklahoma State Highway 171.svg Oklahoma State Highway 171
 * PA-171.svg Pennsylvania Route 171
 * South Carolina 171.svg South Carolina Highway 171
 * Secondary Tennessee 171.svg Tennessee State Route 171
 * Texas 171.svg Texas State Highway 171
 * Business State Highway 171-E (Texas)
 * Texas Loop 171.svg Texas State Highway Loop 171
 * Texas FM 171.svg Farm to Market Road 171
 * Utah SR 171.svg Utah State Route 171
 * Virginia 171.svg Virginia State Route 171
 * WA-171.svg Washington State Route 171
 * WIS 171.svg Wisconsin Highway 171
 * WY-171.svg Wyoming Highway 171
 * Territories:
 * Ellipse sign 171.svg Puerto Rico Highway 171