The Ammar Mosque and Osman Ramju Sadick Islamic Centre (traditional Chinese: 愛群清真寺林士德伊斯蘭中心; simplified Chinese: 爱群清真寺林士德伊斯兰中心; pinyin: Àiqún Qīngzhēnsì Línshìdé Yīsīlán Zhōngxīn) or Wan Chai Mosque is a mosque and Islamic centre in Wan Chai, Hong Kong. It is the third mosque built in Hong Kong.