Construction of the palace began on 6 May 1782, at the order of King Phutthayotfa Chulalok (Rama I), the founder of the Chakri dynasty, when he moved the capital city from Thonburi to Bangkok. Throughout successive reigns, many new buildings and structures were added, especially during the reign of King Chulalongkorn (Rama V). By 1925, the king, the Royal Family and the government were no longer permanently settled at the palace, and had moved to other residences. After the abolition of absolute monarchy in 1932, all government agencies completely moved out of the palace.

In shape, the palace complex is roughly rectangular and has a combined area of 218,400 square metres (2,351,000 sq ft), surrounded by four walls. It is situated on the banks of the Chao Phraya River at the heart of the Rattanakosin Island, today in the Phra Nakhon District. The Grand Palace is bordered by Sanam Luang and Na Phra Lan Road to the north, Maharaj Road to the west, Sanam Chai Road to the east and Thai Wang Road to the south.

Rather than being a single structure, the Grand Palace is made up of numerous buildings, halls, pavilions set around open lawns, gardens and courtyards. Its asymmetry and eclectic styles are due to its organic development, with additions and rebuilding being made by successive reigning kings over 200 years of history. It is divided into several quarters: the Temple of the Emerald Buddha; the Outer Court, with many public buildings; the Middle Court, including the Phra Maha Monthien Buildings, the Phra Maha Prasat Buildings and the Chakri Maha Prasat Buildings; the Inner Court and the Siwalai Gardens quarter. The Grand Palace is currently partially open to the public as a museum, but it remains a working palace, with several royal offices still situated inside.