Background
Crosio was born in Sydney, New South Wales and educated at Strathfield Girls High School.
Crosio was born in Sydney, New South Wales and educated at Strathfield Girls High School.
She was an alderman of Fairfield City Council in suburban Sydney from 1971 to 1980 and Mayor from 1974 to 1975 and 1977 to 1980. Crosio was the first woman elected to the New South Wales Legislative Assembly in thirty years, representing Fairfield from 1981 to 1988 and Smithfield from 1988 to 1990. She was the first woman Cabinet minister in New South Wales: Minister for Natural Resources 1984-1986, Minister for Local Government 1986-1988 and Minister for Water Resources 1986-1988.
Crosio represented Prospect, New South Wales from March 1990 to October 2004.
She was Parliamentary Secretary to the Minister for Arts and Administrative Services in 1993, Parliamentary Secretary to the Minister for Environment, Sport and Territories 1993-1994 and Parliamentary Secretary to the Minister for Social Security 1994-1996. Crosio was Chief Opposition Whip 2001-2004.
She retired at the 2004 election.
Crosio was made a Member of the Order of the British Empire for services to local government and the community in 1978.