The California-based company will begin providing same-sex matches under as part of a settlement with New Jersey's Civil Rights Division.
Garden State resident Eric McKinley filed a complaint against the online matchmaker in 2005.
Under terms of the settlement, the company can create a new or differently named Web site for same-sex singles. The company can also post a disclaimer saying its compatibility-based matching system was developed from research of married heterosexual couples.
Neither the company nor its founder, Neil Clark Warren, admit any liability.
In addition, eHarmony will pay the division $50,000 to cover administrative costs. It will pay McKinley $5,000 and give him a free one-year membership to its new service.