Margaret Louise Barrell MNZM (born 30 December 1952) is a New Zealand hymn writer and music teacher.

She went on to study at the University of Canterbury, from where she graduated with a Bachelor of Arts degree in psychology.

She writes for Hymnary.org, and is a board member of the New Zealand Hymnbook Trust.

[3] She teaches music, and is a lay preacher and musician at St Mary’s Anglican Church in Christchurch.

[4] In the 2024 New Year Honours, Barrell was appointed a Member of the New Zealand Order of Merit, for services as a hymn writer.