Mother Mary Clare Moore (20 March 1814 – 13 December 1874) was an Irish Sister of Mercy, a Crimean War nurse and a teacher.

She took up a position as governess to a niece and a young cousin of Catherine McAuley on 13 October 1828 at the House of Mercy, Baggot Street.

She became the first superior of the Bermondsey convent at its foundation on 19 November 1839, an appointment she held temporarily until Sister Mary Clare Agnew took up the post.

[1][5] At the request of Bishop Thomas Grant, Moore and four other sisters left London on 17 October 1854 to nurse sick and wounded British Army soldiers in Crimea.

Nightingale acknowledged her indebtedness to Moore's nursing duties and paid tribute to her qualities in a letter from Balaclava.

[1][7] Moore is included in the painting The Mission of Mercy by Jerry Barrett which depicts Nightingale receiving a wounded soldier at the Barrack Hospital.