Rachel Ballagh is an Irish artist, working with photography, drawing and painting. From Dublin, she now lives and works in south-eastern County Cork. She has exhibited since the mid-1990s, and her work is held in a number of private collections, and was added to Ireland's National Collection in 2023.

Rachel Ballagh was born to artist Robert Ballagh and his wife Betty (née Carabini, 1950–2011) in 1968; she has a younger brother.^[1] She grew up in Broadstone in north inner city Dublin, and attended a local Catholic school but was asked to leave as she refused to recite daily prayers.^[1] She later attended the National College of Art and Design a short distance away, graduating in 1992.^[2][1] She was a member of Militant Labour Youth.^[1] She featured in a number of her father's paintings.^{[3]: 147, 160, 161, 167}

Ballagh worked at Temple Bar Gallery and Studios, and also taught photography on the Youthreach programme. Both of these concluded in 2002,^[2] and her home was needed for renovation, so she moved to coastal County Cork, with her work changing focus as a result.^[1] She commented: "I found my work shifted from mainly lens based, to drawing... line, shape, structure and colour of the flora and fauna, ... drawings capture a sense of ordered chaos."^[4] In drawing, she works with graphite pencil, charcoal, paint chalk and watercolours, with added organic material, and also produces digital modifications of her physical works.^[2]

Rachel and her father have on occasion worked together. They had a joint show, Ballagh & Ballagh ... On Paper, at the Kenny Gallery in Galway in 2013.^[4][1]

In 2002, Ballagh moved to the family's holiday home near Ballycotton, County Cork,^[1] and while she initially meant to stay briefly, as of 2022, she still lives and works there.^[10] Around 2012, she survived a severe bout of diverticulitis (a condition which contributed to her mother's death in 2011) and related complications, had another serious medical incident involving an induced coma in 2015,^[1] and later had to have radiotherapy;^[8] she has mentioned that mortality is a major theme in her work.^[1]