[1] She is the daughter of Petronella and Ron Byrnes; her mother was born in the Netherlands and arrived in Australia as a child.

[11][12][13] Alison Byrnes released her offshore wind zone submission in favour of the proposal but recommended multiple changes.

[23][24] In response, Alison Byrnes alongside fellow members of parliament, Stephen Jones and Fiona Phillips made a joint submission into the consultation process and the broader community awareness of the Illawarra Offshore Wind Zone.

[25][26] During the 2022 Australian Federal Election, Alison Byrnes supported the establishment of community batteries in Dapto and Warrawong.

[29][30] Byrnes is married to Paul Scully, an ALP member of the New South Wales Legislative Assembly.