Fredrik Grønningsæter (26 May 1923 – 28 April 2016) was a bishop of the Diocese of Sør-Hålogaland from 1982 until 1992.
Grønningsæter was born in the municipality of Stranda in Sunnmøre, Norway on 26 May 1923.
He was the son of Fredrik and Katharina (née Ottesen) Grønningsæter.
His great-grandfather on his mother's side was Carl Peter Parelius Essendrop, who was also a bishop in the Church of Norway.
In 1982, he was appointed Bishop of the Diocese of Sør-Hålogaland, a post he held until he resigned in 1992.