Xinzhuang District (Chinese: 新莊區; Hanyu Pinyin: Xīnzhuāng Qū; Tongyong Pinyin: Sinjhuang Cyu) is an inner city district in the western part of New Taipei in northern Republic of China (Taiwan). It has an area of 19.74 km2 (7.62 sq mi) and a population of 388,110 people (2005).
Until the 25 December 2010 creation of New Taipei, Xinzhuang was itself a county-controlled city (新莊市; Xīnzhuāng Shì; Sin-chng Chhī; Postal map spelling: Hsinchuang) since 15 January 1980 in the former Taipei County.
The district is bordered by Wugu and Taishan to the north, Sanchong to the east, Banqiao and Shulin to the south, and Taoyuan County to the west.
Senior High Schools