Congratulations to President Roussef!
socalfitness saidOther obvious examples: Margaret Thatcher, Angela Merkel, Golda Meir (who I did not see listed in that neat Wiki reference).
That's true, and it also doesn't list Indira Gandhi or Jóhanna Sigurðardóttir (the openly lesbian Prime Minister of Iceland). However, it looks like that particular Wikipedia page only lists women who served as head of state, rather than women who served as head of government. It's a fine distinction, and in some countries (including the US) the two roles are combined into one position, so it's sometimes confusing. There is another Wikipedia page that lists female heads of government, and Thatcher, Merkel, Meir, Gandi, and Jóhanna are all on there:http://en.wikipedia.org/wiki/List_of_elected_or_appointed_female_heads_of_government