From Bloomberg today:
Angela Merkel was sworn in for a second term as German chancellor, opening a legislative period that she’s said will be dominated by efforts to spur growth as Europe’s biggest economy emerges from recession.
Angela Merkel was the first woman to be elected German chancellor — in 2005. Margaret Thatcher served as British Prime Minister from 1979 to 1990. Mary Robinson was President of Ireland from 1990 to 1997; Mary MacAleese succeeded her and is still in office. Indira Gandhi served four terms as Prime Minister of India, starting in 1966. Benazir Bhutto was Prime Minister of Pakistan twice.
The following countries all currently have women Presidents or Prime Ministers in office: Liberia, Chile, Philippines, Finland, Mozambique, Ukraine, Haiti, Bangladesh, Iceland, Croatia, Lithuania.