Odd Henning Grønmo (born 15 March 1922 - 29 April 2012) was a Norwegian politician for the Christian Democratic Party.
He was born in Brønnøy, but spent his professional career at Bodø Teacher's College from 1951 to 1989. He was a member of Bodin municipal council from 1956 to 1963, serving as deputy mayor from 1956 to 1959 and mayor from 1960 to 1963. From 1960 to 1983 he was a member of Nordland county council, serving as county mayor from 1976 to 1983.
He was also a supervisory council member of the Bank of Norway for twelve years. He resided in Bodø.