Alibag is a coastal town and municipal council in Raigad district of Maharashtra, India. It is the headquarters of the Raigad district. Alibag and its surrounding villages are the historic hinterland of Bene Israeli Jews. There is a synagogue in the "Israel Ali" area of the town. A Bene Israelite named Ali used to live there at that time. He was a rich man and owned many plantations of mangoes and coconuts in his gardens. Hence the locals used to call the place "Alichi Bagh"(Marathi for "Gardens of Ali"), or simply "Alibag", and the name stuck. Revdanda, Chaul, Nagaon, Akshi, Varsoli, Thal, Navgaon, Kihim and Aawas villages were known as "Ashtagare".

Alibag is located about 120 km south of Mumbai, at 18°38′29″N 72°52′20″E. The average elevation is 0 metres (0 feet).The District Government offices are located along the sea coast road. Alibag is the center place of Raigad District.

The summers here have a good deal of rainfall, while the winters have very little. According to Köppen and Geiger, this climate is classified as Aw. The average annual temperature is 26.4 °C in Alibag. The rainfall here averages 2345 mm

Today Economy of Alibaug is mainly based on Tourism but its core business of farming and fishing. Rice is main crop but also cultivate palm groves, coconut and kokam trees. Some areas also has mango plantation. Alibaug is vast coastline so Fishing is another core business helps in economy Surmai, Bangda, Pomphret, Prawns and Huida is main available fishes. Government and Municipal Corporation take huge efforts to bring industries into region. First industry in the region plant of Rashtriya Chemical and Fertilizers followed by GAIL, ISPAT, Welspun, Maxsteel, and RPCL.

Alibag population is mainly Agri-Koli and Kunbi. People celebrate Pola and Nag Panchami Festival.