You can easily set up a profile, upload photos and start meeting women!
Zoosk This is one of the excellent new sites with plenty of free features. Ok Cupid This free dating site has exploded onto the scene and it offers a cool option.
You can join with your email address or with your Facebook login and browse the thousands of single ladies located in your area. They also have a blog about ways to use the dating site, and a recent post on what types of profile pictures work best is a great example of how they offer real advice based on actual usage by real people.
Of course, they have upgrade options as well, but the free site if pretty solid.
That is the main reason (and you probably have already figured it out) the number of females is greater than males.