Robert Cecil Hayes (19 January 1900 – 3 September 1977) was a New Zealand astronomer, seismologist and organist.
Hayes became acting-director of the observatory after Charles Edward Adams retired from the position in 1936.
[2] One of the contributions Hayes had while at the Observatory was the application of the Richter scale in New Zealand.
Hayes married Margaret Wyn Beere on 1 December 1932; they had two daughters.
He was the organist at St Mary's Anglican Church in Karori, Wellington for 35 years.