Sir Lloyd George Geering ONZ GNZM CBE (born 26 February 1918) is a New Zealand theologian who faced charges of heresy in 1967 for teaching that the Bible's record of Jesus' death and resurrection is not true. He considers Christian and Muslim fundamentalism to be "social evils". Geering is emeritus professor of religious studies at Victoria University of Wellington. In 2007, he was appointed a Member of the Order of New Zealand, New Zealand's highest civilian honour, limited to 20 living people. Geering turned 100 in February 2018.

Geering was born in Rangiora on 26 February 1918, the son of Alice (née Johnston) and George Frederick Thomas Geering. He was brought up in Dunedin, before the family spent four years from 1927 to 1930 in Australia, where Geering was dux of Warrnambool Elementary School, then returning to Dunedin. He was educated at Otago Boys' High School from 1931 to 1935, where he was dux in his final year and vice-captain of the hockey 1st XI.

In 1936, Geering went on to study mathematics at the University of Otago. He "embraced" the Christian tradition in 1937, after a friend invited him to church and to the Student Christian Movement. This changed his life "radically", although, being strongly anti-evangelical, he only reluctantly acknowledged it as a kind of "conversion". He applied to study for the ministry at Knox College and was accepted, but told to finish his Bachelor of Arts degree first. He was a member of the university's first-grade hockey team and active in university dramatic productions and debating. He was elected president of the Otago Student Christian Movement in 1939. Geering was nominated for a Rhodes Scholarship by the University of Otago in 1939 and graduated Bachelor of Arts with first-class honours in 1940.

After completing his BA(Hons), he entered Knox College as a theological student in 1940, and was exempted from military service in World War II. He later said:

I was a pacifist anyway by this stage. I took my Christian convictions so seriously that I couldn’t reconcile them with being a soldier.

On 22 May 1943, Geering married Nancy Marie McKenzie at Trinity Presbyterian Church, Timaru. The couple had two children before Nancy Geering died from tuberculosis in Dunedin on 4 October 1949. On 20 November 1951, Geering married Elaine Morrison Parker, a speech therapist, and they went on to have one child. Elaine Geering died in 2001. Geering married Shirley Evelyn Adams in 2004. She died at the age of 95 in 2021.

Geering was ordained as a minister of the Presbyterian Church of New Zealand in 1943 and practised as a minister in Kurow; Opoho, Dunedin (1945–1950); and St James, Wellington (1950–1956) before turning to theological teaching. He was the honorary associate minister of St John's Church in Wellington from 1971 to 1983. He was named honorary assistant at St Andrew's in Wellington in 1989. Geering remains on the register (Fasti) of New Zealand Presbyterian ministers.

Geering has held the positions of professor of Old Testament studies at Presbyterian Church Hall, Brisbane, Queensland, Australia (1956–1960), professor of Old Testament studies at Theological Hall, Dunedin (1960–1963), and principal of Theological Hall, Dunedin (1963–1971). In 1971, Geering became the foundation professor of religious studies at Victoria University of Wellington and held this position until his retirement in 1984 when he was appointed professor emeritus. In 1983, he became a lecturer at the St Andrew's Trust for the Study of Religion and Society.