More » With just over seven million unique monthly users, e Harmony is the largest dating site focused exclusively on heterosexual, long-term partnerships that (hopefully) lead to marriage.

Their free hour-long test is fascinating to help you determine compatibility markers, however, there's zero way to tell if the person you're matched with also has an account, and therefore can reply to your questions.

More » I freely admit that I'm biased when it comes to Ok Cupid, as it's taken my top spot on my Best Dating Site list for years now.

I still love it, and highly recommend it to all singles and polyamorous couples looking for love, friendship, or even something a bit more casual.

With just over 10 million unique monthly users, it's not the largest of the dating sites (although it is owned by Match.com), however I do believe it has the best offerings on this list with regards to cost (free, with options to pay for a few fun, yet non-crucial features), number of members, and usability.

, meaning more people visit these online dating sites on a monthly basis.

Although this list can change every few months, the biggest of the bunch usually stay the same.

So if you're looking for an online dating site that offers the most active members, in all parts of the world with biggest features and most active forums, these are your best places to start.

With an (estimated) 35 million unique monthly users, has the largest active membership of all the dating sites out there - and for good reason, however with some caveats: it's geared more towards folks looking for long term relationships, you'll want to carefully craft your profile to focus on such, and make sure you carefully review all emails for potential romance scams, as Match seems to attract more than their fair share of mysterious strangers trapped in Nigeria.

More » The largest of the free dating sites, POF boasts an (estimated) 23 million unique members using the site every month.

While owner Markus Frind has wiped the site of folks only looking for casual dating or an age-gap relationship, I've found this has only increased the incidence of folks lying about their age or intentions.

Still, it's a great site to get your feet wet in the online dating world, just to see what's out there and how the process works.

More » Zoosk hosts an estimated 11.5 million unique users a month, and it's easy to see why: the sign-up is quick and easy, there's little to no profile writing needed, and the search features prominently display photos.