Niamh Greene (born 1971) is an Irish writer.
Greene was born in March 1971. She studied English and French at university and worked in public relations and tourism before becoming a full-time mother. She started writing while her children were at school.
Her first novel, Secret Diary of a Demented Housewife, was described as being part of a "yummy-mummy lit" trend which followed Bridget Jones's Diary ten years later and reflected that next phase of life. Her other books include Confessions of a Demented Housewife, Rules for a Perfect Life, and A Message to Your Heart.