zooskZoosk, which boasts the world’s largest social dating community, said today it has raised $30 million in a fourth round of funding.

The round was led by new Bessemer Venture Partners. Existing investors Canaan Partners and ATA Ventures also participated. David Cowan, a partner at Bessemer, will join Zoosk’s board.

The San Francisco company said it will use the funds to expand globally, launching marketing activities in key regions, and invest in new features and applications. Since its launch in December, 2007, Zoosk has attracted more than 40 million users from 40 countries. Users can join by adding Zoosk apps on Facebook, MySpace, Bebo, hi5 and Friendster. Users can also join via mobile and Zoosk.com.

Shayan Zadeh, co-chief executive of Zoosk, said the company focuses on building a fun and safe social network. Revenues have hit a $30 million run rate. The company makes money from the sale of Zoosk premium memberships, virtual goods transactions and ads. Singles can buy Zoosk coins to send virtual gifts. To date, Zoosk has raised $40.5 million. The company was founded in January, 2007 by Zadeh and Alex Mehr.