Captain Sarah Ellen Oakley is a British Royal Navy officer, who, until December of 2023, served as the commanding officer of Britannia Royal Naval College, Dartmouth.

Britannia Royal Naval College (BRNC), commonly known as Dartmouth, is the naval academy of the United Kingdom and the initial officer training establishment of the Royal Navy. It is located on a hill overlooking the port of Dartmouth, Devon, England. Royal Naval officer training has taken place in Dartmouth since 1863. The buildings of the current campus were completed in 1905. Earlier students lived in two wooden hulks moored in the River Dart. Since 1998, BRNC has been the sole centre for Royal Naval officer training.