The round was led by DAG Ventures, with participation from Benchmark Capital.
The company intends to use the new funds to expand its investment in R&D, acquisitions and mobile applications while increasing its reach to more new markets.
GrubHub, which has raised $34m to date, services Chicago, New York, Los Angeles, San Francisco, Boston, Philadelphia, Washington D.C., San Diego, Oakland, Seattle, Portland, Denver and Boulder and has plans to double its footprint in 2011.
Founded in 2004 by CEO Matt Maloney and Mike Evans, the service organizes and simplify restaurant information available to consumers. Visitors to the site or mobile users enter their address to see every local restaurant that delivers to them. Diners can view menus and coupons, read reviews and order for free online, by phone or through the GrubHub iPhone and Android apps.