Aaron Buzacott the elder (4 March 1800 – 20 September 1864) was a British missionary, Congregationalist colleague of John Williams (the 'Martyr of Erromanga'), author of ethnographic works and co-translator of the Bible into Cook Islands Māori. Buzacott was a central figure in the South Seas missionary work of the London Missionary Society, and lived on Rarotonga (one of the Cook Islands) from 1828 to 1857. During his time there, he assisted in the development of the written form of Cook Islands Māori, compiling a primer on English and Cook Islands Maori grammar. Buzacott, along with Williams and other missionary colleagues, contributed to the first translation of the Bible into that language, and translated additional theological texts including lectures from his education in London.