Google also offers the mapping site code for free to groups that want to include it on their Web sites, according to the company.

This isn't the first Google tool aimed at the upcoming elections. The search firm recently created an where visitors can track the latest projected U.S. electoral vote totals for the presidential candidates, based on the latest voter-preference polls. Using the site, visitors can get a real-time look at how the electoral votes are stacking up for the candidates as Election Day approaches.

Google also created a Web page with legal information site where prospective voters can find out whether their states have laws that allow them to take time away from work to vote.

Dorothy Chou, an election's team spokeswoman for Google, said the new Web sites were created after Google researchers found information in the 2004 U.S. Census revealing that many Americans didn't vote because they didn't know where to cast their ballots. Others said they couldn't take time off from work to vote, she said.

"So we basically put together these two maps to remedy that situation," she said. Google researchers also saw that many people in 2004 and in this year's primary elections conducted Google searches looking for that kind of information, Chou said.