The Big Tech company launched the measure information center on Thursday as an added to counter misinformation.
The hub can be accessed from the menu of Facebook and Instagram, and "will serve as a one-stop-shop to give people in the US the tools and information they need to make their voices heard at the ballot box", the social media giant said.
It is the latest effort by the platform to prevent a repeat of the online disinformation that marred the 2016 US election.
Facebook said the voter information tool would also help people navigate the changes to voting procedures being brought in by various states due to the coronavirus pandemic.
"It is also important that we help protect the integrity of our elections," the San Francisco-based social media giant said.
Facebook and Instagram users can use the tool to check if they are registered to vote and how to do so if they are not.
The social media group said it would from Thursday add labels to voting-related posts on Facebook and Instagram, after last month rolling them out for politicians.