関宿(せきじゅく、せきしゅく)は、江戸時代の日本の東海道の宿場のひとつ。旧伊勢国、現在の三重県亀山市関町にある。国の重要伝統的建造物群保存地区に選定されており、往時の街並みが保たれている。「日本の道100選」にも入選している。
Sekijuku (also called Sekishuku) was one of the post towns on the Tokaido road in Japan during the Edo period. It is located in the former Ise province, now Sekimachi, Kameyama city, Mie prefecture. It has been designated as an Important Preservation District for Groups of Traditional Buildings by the national government, and the townscape of the past has been preserved. It has also been selected as one of the “100 Best Roads in Japan.”