Niamh Fahey (born 13 October 1987) is an Irish footballer who plays as a defender or midfielder for English FA WSL team Chelsea Ladies and the Republic of Ireland women's national football team. Before joining Chelsea in December 2014, Fahey spent six seasons with Arsenal Ladies. She has also won national cups playing Gaelic football with Galway Ladies Football. Niamh is the sister of Galway's 2001 All-Ireland-winning Gaelic football captain Gary Fahey.