K171 or K-171 may refer to:
*
Soviet submarine K-171
*
K-171 (Kansas highway)
K-171 is a state highway in the southeastern part of the U.S. state of Kansas. The highway mostly lies on the Crawford County/Cherokee County line except for the easternmost of the highway when it is entirely in Cherokee County. Its western ...
, state highway in Kansas
*
K-171 (1958–2010 Kansas highway), former state highway in Kansas
{{Letter-Number Combination Disambiguation