Gaoyou (simplified Chinese: 高邮; traditional Chinese: 高郵; pinyin: Gāoyóu), is a county-level city under the administration of Yangzhou, Jiangsu province, China, located in the Yangtze River Delta on the north side of the Yangtze River.

Recent archaeological finds at the Longqiuzhuang site in Gaoyou has found evidence of rice growing dating back 5,500-7,000 years.

Gaoyou ting (commune, 亭) located in this area was established in Qin dynasty.

In the next year, Zhang established Kingdom of Dazhou, while Gaoyou functioned as its temporary capital until 1356.

Later, the city withstood the siege led by Toqto'a, since the complicated politics severely reduced the cohesion of the Yuan army.

Three months after Japan's unconditional surrender on August 15, 1945, Gaoyou Japanese and fake troops, surrounded by the military and civilians in the liberated areas, resisted and refused to lay down their arms.

The name of Gaoyou comes from the building of Gaotai and Posting Pavilion during the reign of King Yingzheng of Qin dynasty.

Geographical location provides important water resources and rich aquatic products for this county.

Gaoyou has the characteristics of mild climate, adequate rainfall, four distinctive seasons, sufficient sunshine and long frost free period.

Primary agricultural products include rapeseed, rice, wheat, poultry and eggs.