Carney made her senior international debut for England in 2005. She represented England at four FIFA Women's World Cups (2007, 2011, 2015 and 2019) and at four UEFA Women's Championships (2005, 2009, 2013 and 2017). At the time of her retirement, she was the second most capped England player with 144 appearances, although this has since been surpassed by Jill Scott. She also represented Great Britain at the 2012 Summer Olympics.