The #pantsuitnation group say they are men and women from all states who believe Clinton should be the next president.
Maine resident Libby Chamberlain started the group after the final presidential debate.
Chamberlain and her friend told CNN that woman wearing pantsuits was a way to challenge gender roles through an item of clothing historically seen "as a man's prerogative".
"We talked about how beautifully and stoically Hillary embodies women's fight for equality, and how the pants suit is an emblem of that struggle," she said.
As the voting heats up #WearWhiteToVote also becomes the rallying cry on social media for women to vote.
Data from Lyst, the world's biggest fashion shopping website, indicates that white isn't enough - people are flocking to white pantsuits for the occasion and following Hillary's example of power dressing.
"The pantsuit has had a massive resurgence in interest with a 460 per cent uplift since January 2016. The interest in white pantsuits in particular has certainly confounded expectations - especially as we usually see a seasonal dip for white colour ways across every category," said editorial director Katherine Omerod.
On Lyst, white has become the most-searched colour of pantsuit, with a 7 per cent lead over black, previously the most popular colour.
-nzherald.co.nz, news.com.au
