Islam in Bangkok has deep historical roots that trace back to the early Ayutthaya period (14th–18th centuries), long before Bangkok became the capital of Thailand. Muslim traders such as Persian, Indian, Malay, and Cham, played a key role in diplomacy and commerce during the Ayutthaya Kingdom. After the fall of Ayutthaya in 1767, and Bangkok as its new capital, Muslim communities also resettled along the Chao Phraya River.

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Over time as the city grew, Bangkok saw the formal establishment of several Muslim enclaves, mosques, and cemeteries. The Muslim population was ethnically diverse, including Thai Muslims, Malays, Chams, South Asians, and Arab descendants, each contributing to diverse architecture, cuisine, and trade.

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Today, Bangkok is home to vibrant Muslim communities spread across districts such as Thonburi, Nong Chok, and Minburi, reflecting the city's multicultural identity.