Lois Brown (born January 22, 1955 in Stouffville, Ontario) is a Canadian businesswoman and politician, currently the elected Member of Parliament for Newmarket—Aurora. She is a member of the Conservative Party of Canada.

She is a former member of the Canadian Alliance, and was nominated as its candidate prior to the merger with the Progressive Conservative Party of Canada.

In the 2004 federal election, Brown lost the Conservative nomination to Belinda Stronach, who went on to defeat Liberal candidate Martha Hall Findlay by a narrow margin. Stronach later crossed the floor to the Liberals and became a cabinet minister.

Brown was the Conservative nominee in the 2006 federal election, where Stronach defeated her by 4,805 votes.

In the 2008 election, Brown was the riding's Conservative candidate once again, and this time she won the seat by defeating the new Liberal candidate, Tim Jones, by 6,623 votes. Stronach did not seek re-election and retired from politics.

In the 2011 election, Brown resumed her role as Conservative party candidate for the riding. She won a landslide victory over the other five candidates with 54.33% of votes in her riding, defeating the liberal candidate Kyle Peterson by 17,724 votes.