She ran as an independent at the 1903 federal election, the first at which women were eligible to be candidates.
Although she spent most of her life in New South Wales, in 1918 she also became one of the first two women to stand for the Parliament of South Australia.
Siggins was introduced to politics through her involvement in the labour movement, and initially supported the Labor Party.
She eventually fell out with the party over its refusal to endorse her as a candidate.
Her final run for parliament came at the 1922 federal election, where she became the first woman to stand for the Country Party.