Some of these sites include Match.com, OKCupid and

Focusing on a narrow pool of candidates, these online dating sites help match people up with someone of a similar religion, profession, or sexual orientation.

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Mingle2 is a membership service of which users pay to be a part.

It was originally a service called Just Say Hi, but the site transitioned to Mingle2 in 2008 and now works with many populations of singles.

Online dating has grown in popularity to the point where there is almost no social stigma attached to it.

With an estimated 1,000 online dating sites in existence, however, it can be hard to sift through all the options and decide which is the best site.

OKCupid is one of the most popular dating sites and is free to sign up initially.

It works with special algorithms that match users with potential dates.

View Profile Harvard Business School graduate, Mark Brooks, has been an expert in the Internet dating business since 1998.

He is currently the CEO of Courtland Brooks, a consultancy agency for the Internet dating industry, and runs Online Personals

Our is a unique dating site specifically catered to people over 50.

The company focuses on the interests of people in a certain age range who want a place to feel confident and comfortable while seeking a potential date.

If you have a very specific set of interests, there are many sites that may cater to your niche.