Robert Maunsell (24 October 1810 – 19 April 1894) was a New Zealand missionary, linguist and translator. He was born in Milford, County Limerick, Ireland on 24 October 1810.
Robert Maunsell joined the Church Missionary Society and arrived in the Bay of Islands in 1835 and was appointed to Te Waimate mission, and he was sent to established the Manukau mission station that same year; where he operated a school. He remained in the Auckland region for a number of years. In 1859 he was working in the Waikato. The Invasion of the Waikato, in response to the "Kingitanga Movement", resulted in Maunsell being located in Te Kohanga, near Port Waikato.
After 1844 the Rev. Robert Maunsell worked with William Williams on the revision of the translation of the Bible into the Māori language. William Williams concentrated on the revision of the New Testament; Maunsell worked on the revision of the Old Testament, portions of which were published in 1840 with the full translation completed in 1857.
In 1845 the Book of Common Prayer was translated by a committee comprising William Williams, Robert Maunsell, James Hamlin and William Puckey.
He was Archdeacon of Waitemata from 1868 to 1870; and then of Auckland until 1883.