The Osan–Hwaseong Expressway (Korean: 오산화성고속도로; Hanja: 烏山華城高速道路; part of Expressway 171) is an expressway in South Korea that runs between Osan and Hwaseong.

Established on October 29, 2009, it is the shortest expressway in South Korea with a length of 2.55 kilometers (1.58 miles).

It shares its expressway number with Yongin-Seoul Expressway.

[1] On October 29, 2009, all routes were started through the West Osan Junction- Annyeong Tollgate.

This article relating to roads and highways in South Korea is a stub.