The Fourth Mayawati ministry was the Council of Ministers in the 15th Uttar Pradesh Assembly, headed by Chief Minister Mayawati.
The ministry was formed after the 2007 Uttar Pradesh Legislative Assembly election, in which the Bahujan Samaj Party (BSP), under Mayawati's leadership, secured an absolute majority by winning 206 out of 403 seats. She took oath as the Chief Minister on 13 May 2007.