The Nanzhuang Old Street or Osmanthus Alley () is an old street in Nanzhuang Township, Miaoli County, Taiwan.
The street is also called Osmanthus Alley due to the fact that it is famous for its osmanthus wine.
The street was the business center of the olden days of the town when it prospered due to the booming of lumber and mining industries within the area. The area however faced a downturn with the declining of those industries.