New York State Route 171 (NY 171) is a state highway running east to west through Herkimer County, New York, in the United States. It connects the hamlet of Gulph in the town of Frankfort to the village of Frankfort by way of the Frankfort Gorge. Its western end is at the junction of County Route 145 (CR 145) and CR 185 southeast of Gulph. The eastern end is 5.69 miles (9.16 km) to the east at an intersection with Main Street in Frankfort village. NY 171 is a narrow, two-lane highway for its whole length.

Frankfort is a town in Herkimer County, New York, United States. The town is named after one of its earliest settlers, Lawrence (Lewis) Frank. The town of Frankfort includes a village, also called Frankfort. Frankfort is located east of Utica, and the Erie Canal passes along its northern border. At the time of the 2020 census, the population was 7,011, down from 7,636 in 2010.