Liaison Office is the name of some organization or de facto embassies, which may refer to:

• Liaison Office (Hong Kong), the representative office of China (PRC) government in Hong Kong
• Liaison Office (Macao), the representative office of China (PRC) government in Macao
• Taipei Liaison Office in the Republic of South Africa, the representative office of ROC (Taiwan) government in South Africa
• Liaison Office of the Republic of South Africa, the representative office of South Africa government in ROC (Taiwan)
• Inter-Korean Liaison Office, the joint representative office of North and South Korea government.