The Shahi Masjid () was a former mosque, since demolished, located in the Saidabad area of Prayagraj (formerly Allahabad), in the state of Uttar Pradesh, India. Established in 1643 CE, the mosque was demolished on January 9, 2023, as part of a road-widening project.
The masjid was believed to have been constructed during the 17th century, possibly under the rule of Sher Shah Suri, who established the Sur Empire in India. The mosque was, prior to its demolition, the oldest Mughal mosque in Prayagraj.
In 2023, the mosque was demolished to make way for a road-widening project on the Grant Trunk Road.