Eight people were on board the helicopter and none are believed to have survived the crash, the local media reported.
The news channel Al-Ekhbariya announced the death of Prince Mansour bin Moqren, the deputy governor of Asir province.
They were reportedly taking a helicopter tour of development projects near the coast.
The prince was serving as the deputy governor of the southern province of Asir. He was a son of Muqrin bin Abdulaziz Al Saud, who briefly was Saudi Arabia's crown prince from January to April 2015, the reports said.
The cause of the crash has not yet been revealed.
This also comes after 11 princes including prominent billionaire investor Prince Alwaleed bin Talal and dozens of current and former ministers were arrested in Saudi Arabia on Saturday a night after the formation of an anti-corruption committee by King Salman bin Abdulaziz Al-Saud. (ANI)