The former federal Labor leader looked likely to claim a seat for One Nation in the NSW Upper House, as counting continued on Sunday.
On Sunday morning he said on Twitter that it was an "honour to be elected" and thanked voters for giving the party a "fair hearing and their attention on the campaign trail".
"Travelling around makes you realise what a great place NSW is, with great people. It's an honour to be elected to serve in State Parliament," he said.
Mr Latham on Saturday night said he was hopeful that One Nation would secure two quotas, or Upper House seats.
"We only ran in 12 Lower House seats so I'm keen to see what happens in the Legislative Council," he told Channel Seven.
"At the moment we are tracking towards two quotas [Upper House seats] and when the metropolitan numbers are counted in the Legislative Council they are pretty encouraging."
Mr Latham's election campaign included a call for commercial testing to be introduced to
One Nation party leader Pauline Hanson (left) and One Nation candidate and state leader for NSW Mark Latham speak to the media in Sydney, Wednesday, November 7. Source: AAP
He said welfare 'rorters and opportunists' were falsely claiming Aboriginal and Torres Strait Islander ancestry.
Mr Latham also made headlines for calling the Sydney suburb of Lakemba an "ethnic enclave," a comment which
Gladys Berejiklian was elected premier of NSW on Saturday night, defeating Labor's Michael Daley.
She has been congratulated by all sides of politics for making history by becoming the first woman to be elected premier of NSW by the people.
