Liaison Office is the name of some 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)