Shandong (help·info) (simplified Chinese: 山东; traditional Chinese: 山東; pinyin: Shāndōng; Wade–Giles: Shan-tung) is a coastal province of the People's Republic of China, and is part of the East China region. Shandong has played a major role in Chinese history from the beginning of Chinese civilization along the lower reaches of the Yellow River and served as a pivotal cultural and religious site for Taoism, Chinese Buddhism, and Confucianism. Shandong's Mount Tai is the most revered mountain of Taoism and one of the world's sites with the longest history of continuous religious worship. The Buddhist temples in the mountains to the south of the provincial capital of Jinan were once among the foremost Buddhist sites in China. The city of Qufu is the birthplace of Confucius, and was later established as the center of Confucianism. Shandong's location at the intersection of ancient as well as modern north-south and east-west trading routes have helped to establish it as an economic center. After a period of political instability and economic hardship that began in the late 19th century, Shandong has emerged as one of the most populous (95,793,065 inhabitants at the 2010 Census) and most affluent provinces in the People's Republic of China (GDP of 3.94 trillion CNY in 2010).

With its location on the eastern edge of the North China Plain, Shandong has felt the influence of Chinese civilization since remote antiquity. The earliest dynasties (the Shang dynasty and Zhou dynasty) exerted varying degrees of control over western Shandong, while eastern Shandong was inhabited by the Laiyi peoples who were considered as the "barbarians". Over subsequent centuries, the Laiyi were eventually sinicized.

During the Spring and Autumn Period and the Warring States Period, regional states became increasingly powerful. At this time, Shandong was home to two powerful states: the state of Qi at Linzi and the state of Lu at Qufu. Lu is noted for being the home of Confucius. The state was, however, comparatively small, and eventually succumbed to the powerful state of Chu from the south. The state of Qi was, on the other hand, a major power throughout this entire period. Cities it ruled included Linzi, Jimo (north of modern Qingdao) and Ju.

The Qin Dynasty destroyed Qi and founded the first centralized Chinese state in 221 BC. The Han Dynasty that followed created two zhou ("provinces") in what is now modern Shandong: Qingzhou Province (青州) in the north and Yanzhou Province (兗州) in the south. During the division of the Three Kingdoms Shandong belonged to the Kingdom of Wei, which ruled over northern China.

After the Three Kingdoms period, a brief period of unity under the Western Jin Dynasty gave way to invasions by nomadic peoples from the north. Northern China, including Shandong, was overrun. Over the next century or so Shandong changed hands several times, falling to the Later Zhao, then Former Yan, then Former Qin, then Later Yan, then Southern Yan, then the Liu Song Dynasty, and finally the Northern Wei Dynasty, the first of the Northern Dynasties during the Northern and Southern Dynasties Period. Shandong stayed with the Northern Dynasties for the rest of this period.

In 412, the Chinese Buddhist monk Faxian landed at Laoshan, on the southern edge of the Shandong peninsula, and proceeded to Qingzhou to edit and translate the scriptures he had brought back from India.

The Sui Dynasty reestablished unity in 589, and the Tang Dynasty (618-907) presided over the next golden age of China. For the earlier part of this period Shandong was ruled as part of Henan Circuit, one of the circuits (a political division). Later on China splintered into warlord factions, resulting in the Five Dynasties and Ten Kingdoms period. Shandong was part of the Five Dynasties, all based in the north.

The Song Dynasty reunified China in the late tenth century. In 1996, the discovery of over two hundred buried Buddhist statues at Qingzhou was hailed as a major archaeological find. The statues included early examples of painted figures, and are thought to have been buried due to Emperor Huizong's Song Dynasty repression of Buddhism (he favored Taoism).

The Song Dynasty was forced to cede northern China to the Jurchen Jin Dynasty in 1142. Shandong was administered by the Jin Dynasty as Shandong East Circuit and Shandong West Circuit — the first use of its current name.

The modern province of Shandong was created by the Ming Dynasty. It also included much of modern-day Liaoning (in south Manchuria) at the time. However, the Manchus increasingly asserted independence, and managed to conquer all of China in 1644. Under the Qing Dynasty, which they founded, Shandong acquired (more or less) its current borders.

During the nineteenth century, China became increasingly exposed to Western influence, and Shandong, a coastal province, was especially affected. Qingdao was leased to Germany in 1897 and Weihai to Britain in 1898. The rest of Shandong was generally considered to be part of the German sphere of influence. In addition, the Qing Dynasty opened Manchuria to Han Chinese immigration during the 19th century; Shandong was the main source of the ensuing tide of migrants.

Shandong was one of the first places in which the Boxer Rebellion started and became one of the centers of the uprising. In 1899, the Qing-Dynasty general Yuan Shikai was appointed as governor of the province to suppress the uprising. He held the post for 3 years.

As a consequence of the First World War, Germany lost Qingdao and its sphere of influence in Shandong. The Treaty of Versailles transferred the German concessions in Shandong to Japan instead of restoring Chinese sovereignty over the area. Popular dissatisfaction with this outcome of the Treaty of Versailles (Shandong Problem) led to the May Fourth Movement. Finally, Shandong reverted to Chinese control in 1922 after mediation by the United States during the Washington Naval Conference. Weihai followed in 1930.

The return of control over Shandong fell into the Warlord era of the Republic of China. Shandong was handed over to the Zhili clique of warlords, but after the Second Zhili-Fengtian War of 1924, the Manchuria-based Fengtian clique took over. In April 1925, the Fengtian clique installed the warlord Zhang Zongchang, nicknamed the "Dogmeat General", as military governor of Shandong Province. Time dubbed him China's "basest warlord". He ruled over the province until 1928, when he was ousted in the wake of the Northern Expedition. He was succeeded by Han Fuju, who was loyal to the warlord Feng Yuxiang but later switched his allegiance to the Nanjing government headed by Chiang Kai-Shek. Han Fuju also ousted the warlord Liu Zhennian, nicknamed the "King of Shandong East", who ruled eastern Shandong Province, hence unifying the province under his rule.

In 1937 Japan began its invasion of China proper in the Second Sino-Japanese War, which would eventually become part of the Pacific theatre of the Second World War. Han Fuju was made Deputy Commander in Chief of the 5th War Area and put in charge defending the lower Yellow River valley. However, he abandoned his base in Jinan when the Japanese crossed the Yellow River. He was executed for not following orders shortly thereafter.

Shandong was occupied in its entirety by Japan, with resistance continuing in the countryside, and was one of the provinces where a scorched earth policy ("Three Alls Policy": "kill all", "burn all", "loot all") was implemented by general Yasuji Okamura. This lasted until the surrender of Japan in 1945.

By 1945, communist forces already held some parts of Shandong. Over the next four years of the Chinese Civil War, they expanded their holdings, eventually driving the Kuomintang (government of the Republic of China) entirely out of Shandong by June 1949. The People's Republic of China was founded in October of the same year.

Under the new government, parts of western Shandong was initially given to the short-lived Pingyuan Province, but this did not last. Shandong also acquired the Xuzhou and Lianyungang areas from Jiangsu province, but this did not last either. For the most part Shandong has kept the same borders that it has today.

In recent years Shandong, especially eastern Shandong, has enjoyed significant economic development, becoming one of the richest provinces of the People's Republic of China.

Mandarin dialects are spoken in Shandong. Linguists classify these dialects into three broad categories: Ji Lu Mandarin spoken in the northwest (as well as in neighbouring Hebei), such as the Jinan dialect; Zhongyuan Mandarin spoken in the southwest (as well as in neighbouring Henan); and Jiao Liao Mandarin spoken in the Shandong Peninsula (as well as the Liaodong Peninsula across the sea), such as the Qingdao dialect. When people speak of the "Shandong dialect" (山東話), it is generally the first or the second that is meant; the Jiao Liao dialects of Shandong are commonly called the "Jiaodong dialect" (膠東話).

Shandong cuisine (鲁菜) is one of the eight great traditions of Chinese cuisine. It can be more finely divided into inland Shandong cuisine (e.g. Jinan cuisine); the seafood-centered Jiaodong cuisine in the peninsula; and Confucius's Mansion cuisine, an elaborate tradition originally intended for imperial and other important feasts.

Shandong Bangzi and Lüju are popular types of Chinese opera in Shandong; both originated from southwestern Shandong.

Shandong is mostly flat in terrain. The northwestern, western, and southwestern parts of the province are all part of the vast North China Plain. The center of the province is more mountainous, with the Taishan Mountains, Lushan Mountains, and Mengshan Mountains being the most prominent. The east of the province is the hilly Shandong Peninsula extending into the sea; it separates Bohai Sea in the northwest from the Yellow Sea to the east and south. The highest peak of Shandong is the highest peak in the Taishan area: Jade Emperor Peak, with a height of 1545 m.

The Yellow River passes through Shandong's western areas, entering the sea along Shandong's northern coast; in its traversal of Shandong it flows on a levee, higher than the surrounding land, and dividing western Shandong into the Hai He watershed in the north and the Huai He watershed in the south. The Grand Canal of China enters Shandong from the northwest and leaves on the southwest. Weishan Lake is the largest lake of the province. Shandong's coastline is 3000 km long. Shandong Peninsula has a rocky coastline with cliffs, bays, and islands; the large Laizhou Bay, the southernmost of the three bays of Bohai Sea, is found to the north, between Dongying and Penglai; Jiaozhou Bay, which is much smaller, is found to the south, next to Qingdao. The Miaodao Islands extend northwards from the northern coast of the peninsula.

Shandong has a temperate climate, with moist summers and dry, cold winters. Average temperatures are -5 to 1°C in January and 24 to 28°C in July. Annual precipitation is 550 to 950 mm.

With Jinan serving as the province's economic and cultural centre, the province's economic prowess has led to the development of modern coastal cities located at Qingdao, Weihai, and Yantai. In addition, Weifang and Zaozhuang are also upstart cities.