The All India Majlis-e-Ittehadul Muslimeen (lit. 'All India Council for Unity of Muslims'; abbr. AIMIM) or simply Majlis, is a right-wing Indian political party based primarily in the old city of Hyderabad, It is also a significant political party in the Indian states of Telangana, Maharashtra, Uttar Pradesh, Tamil Nadu and Bihar.

AIMIM has held the Lok Sabha seats for the Hyderabad constituency since 1984. In the 2014 Telangana Legislative Assembly elections, the party won seven seats and received recognition as a "state party" by the Election Commission of India.

For much of its existence, it had little presence beyond old Hyderabad. However, in more recent years, it has begun expanding into other states. It now has a significant presence in Maharashtra, with Imtiyaz Jaleel winning the Aurangabad Lok Sabha constituency in 2019 and with multiple members elected to the Legislative Assembly. It has also made inroads in Bihar, winning five Legislative Assembly seats in 2020.

AIMIM was originally founded as Majlis-e-Ittehadul Muslimeen (MIM) in 1927 by Nawab Bahadur Yar Jung, Nawab Mahmood Nawaz Khan Qiledar of Hyderabad State in the presence of Ulma-e-Mashaeqeen as a pro-partition party. The first meeting was held in the house of Nawaz Khan on 12 November 1927. In 1938, Bahadur Yar Jung was elected president of the MIM. At that time it had only a cultural and religious manifesto. It soon acquired a political complexion. After the death of Bahadur Yar Jang in 1944, Qasim Rizvi was elected as its leader. The Indian government, after police action (named Operation Polo), merged Hyderabad state with India and arrested Razakars including their leader Qasim Rizvi. He was released from jail in 1957 with condition that he will go to Pakistan.

In 1958, before he left for Pakistan, Razvi nominated Abdul Wahid Owaisi as his successor. Abdul Wahed Owaisi, a lawyer organised the party into the All India Majlis-e-Ittehadul Muslimeen. Under his leadership, the AIMIM shifted from a hardline policy of independence to a pragmatic direction. After Abdul Wahed Owaisi, his son Sultan Salahuddin Owaisi took control of AIMIM in 1975 and was referred to as Salar-e-Millat (commander of the community). AIMIM President, Asaduddin Owaisi, his son claims that AIMIM is not the descendant of Razakars.

In 1960, AIMIM won the Mallepally ward of Hyderabad Municipal Corporation. In 1962, Salahuddin won from Patharghatti assembly seat as an independent candidate and later from Charminar constituency in 1967. In 1972, he won from Yakutpura and later in 1978, again from Charminar. In 1984, Salahuddin emerged victorious in the central seat of Hyderabad, which he represented the seat until 2004. Mohammad Majid Hussain of the AIMIM was unanimously elected as the Mayor of Greater Hyderabad on 2 January 2012.

In 1993, AIMIM suffered a split, with a faction led by Amanullah Khan creating the Majlis Bachao Tehreek. As a result, AIMIM was reduced to a single Assembly seat in Andhra Pradesh in 1994. They won four seats in 1999, and increased their total to seven in 2009, where they have remained since then. They joined the Congress-led United Progressive Alliance in 2008, but left it in 2012. AIMIM have seven MLAs, two MLCs, one MP, 67 Municipal Corporators and 70 Councillors in Telangana.

In the 2014 Maharashtra Legislative Assembly election, the party won two seats from Aurangabad Central, Imtiyaz Jaleel won and from Byculla, Waris Pathan won.