It is located along the north side of Interstate 580 at the intersection with Interstate 680, roughly 10 miles (16 km) east of Hayward, and 25 miles (40 km) north of San Jose. The nearest major metropolitan area is that of Oakland, approximately 25 miles (40 km) to the west-northwest on Interstate 580. Because of this, Dublin is known as a "crossroads" of the Bay Area.
The population was more than 46,000 according to the state of California's 2008 estimates. Dublin is home to the headquarters of Sybase, Inc and Arlen Ness, and is home to major financial services, Washington Mutual Bank and Franklin Resources.
Avalon Dublin Station, a newly-completed luxury rental development by AvalonBay Communities is one of several new real estate projects in Dublin. Danville, California-based development firm Blake Hunt Ventures, is planning a 27-acre (110,000 m2) project using 13 acres (53,000 m2) which it currently owns and an adjacent property which it is purchasing from IKEA.
Dublin is known for its Saint Patrick's Day Parade. Every year around Saint Patrick's Day many tourists from all around Alameda County and the Tri-Valley show up to enjoy the festivities. The parade is followed by an all-weekend fair, where one can buy various knick-knacks and other items usually sold at fairs.
In 2007, the fair was moved to Dublin Blvd. which connected the fair to the growing population in East Dublin and increased the fair's size.