Beidaihe District (simplified Chinese: 北戴河区; traditional Chinese: 北戴河區; pinyin: Běidàihé Qū; Wade–Giles: Pei Tai Ho) is a popular beach resort and a district of the city of Qinhuangdao, Hebei province on China's Bohai Sea coast. It has an area of 70.14 km (27.08 sq mi) and, as of 2020, a population of 130,104, as well as a coastline of 22.5 km (14.0 mi).It is also known as a birding haven.

The Beidaihe Beach Resort stretches 10 km (6.2 mi) from east to west, from the Yinjiao Pavilion to the mouth of the Daihe river. The beach itself is covered with fine yellow sand stretching some 100 meters to the sea. The water is shallow. Mount Lianfeng near the beach has two peaks covered by abundant green pines and cypresses. Lush vegetation, caves, decorated pavilions, secluded paths and winding bridges have made it attractive to visitors from throughout China.

Because of its proximity to the capital, Beidaihe has been the location of many important official conferences, and has become well known as the Chinese Communist Party (CCP)'s summer retreat. It is still commonly used by the CCP's highest leadership each July to slip away from the summer heat of Beijing and to plan important strategies in the privacy Beidaihe offers. "Beidaihe," an American diplomat once said, "is China's 'smoke-filled room.'"

After Mao Zedong led the CCP to power in 1949, the new rulers also developed a taste for seaside atmosphere. Mao himself had a summer resort here. Sanatoriums sprang up to reward the efforts of model workers from every industry. A very large Friendship Guesthouse was constructed in 1954, one of dozens across China, to receive the Soviet "elder brothers" who came to assist Chinese development prior to tensions emerging between Soviet and Chinese leadership.

The most infamous event which occurred here involved Lin Biao, who on 13 September 1971, after he was accused of plotting a coup, fled to his villa here with his wife and a son and boarded a plane for the Soviet Union at the local airport; the plane crashed in Mongolia, killing everyone on board.

These conferences were abandoned by order of Hu Jintao in 2003, mainly for two reasons. First, a conference in a resort area appeared to contradict Hu and Wen Jiabao's goal in projecting a frugal image for the party. Second, it was a desire of the leadership under Hu to work through formal party and state mechanisms rather than informal gatherings. However, the Beidaihe meetings resumed in July 2007, when political deliberation took place in anticipation of the 17th Party Congress.

There are two subdistricts and two towns in Beidaihe.

Subdistricts:

• Xishan Subdistrict (西山街道), Dongshan Subdistrict (东山街道)

Towns:

• Haibin (海滨镇), Daihe (戴河镇), Niutouya (牛头崖镇)

• Official website