|Royal and Prior School, Raphoe|
|Motto||In hoc signo vinces – (Under this sign we are victorious)|
|Principal||Dr Howard Welch|
|Colour(s)||Blue and Red|
The Royal and Prior School is a day and boarding school located in Raphoe, County Donegal, Ireland. It was one of a number of 'free schools' created by James I in 1608 to provide an education to the sons of local merchants and farmers during the plantation of Ulster. It has four 'sister' schools: The Royal School, Armagh in Armagh, The Portora Royal School in Enniskillen, County Fermanagh, The Royal School Cavan in County Cavan, and The Royal School Dungannon in Dungannon, County Tyrone. 
The Royal School, Donegal was one of the schools originally established as part of a plan to provide education for children of the settlers who had arrived with the Ulster Plantation. The original intention was to establish a school in the counties of Armagh, Tyrone, Londonderry, Fermanagh, Donegal and Cavan. The original school was built in Donegal Town but was relocated to Raphoe in 1661.
In 1971, the Royal School merged with the Prior School in Lifford which had been established in 1880. The newly amalgamated school, which was renamed, The Royal and Prior School, was constructed just outside the town of Raphoe. It is now a mixed school which attracts students from throughout the county.
Notable alumni and staff
- Elydyr William Rogers Cookman (b. 1927) - school principal
- George Simms - Church of Ireland Archbishop of Armagh
- Canon David Crooks - Prebendary of Howth
- Mark Tighe - Journalist and Author 
- Rachael Darragh (b. 1997) - badminton player
- "The Royal and Prior School". Department of Education. Retrieved 22 March 2020.
- "Royal & Prior Comprehensive School". Retrieved 22 March 2020.
- "1737 – Royal & Prior School, Raphoe, Co. Donegal". Archiseek. Retrieved 22 March 2020.
- "Lifford Army Barracks". National Inventory of Architectural Heritage. Retrieved 22 March 2020.
- "Elydyr William Rogers Cookman". The Peerage. Retrieved 22 March 2020.
- "Installation of Canon David Crooks as Prebendary of Howth". St. Patrick's Cathedral, Dublin. Retrieved 22 March 2020.
- "Donegal journalist pens new book on the rise and fall of John Delaney". Donegal Daily. Archived from the original on 15 May 2020.