Concord is located at . In terms of travelling distance on the ground, it is 29 mi northeast of San Francisco, 22 mi northeast from Oakland, 65 mi southwest of Sacramento, and 51 mi north of San Jose.According to the United States Census Bureau, the city has a total area of 30.1 square miles (78.1 km²), all of it land.The focal point of downtown Concord is Todos Santos Plaza, which encompasses an entire city block and is known for its farmers market, free summer concerts, and large number of surrounding restaurants. Much of the area immediately around downtown has recently been redeveloped, with new high-density apartment and condominium projects to take advantage of the close proximity to public transportation and the vibrant area surrounding the park. Despite this, some crime and homelessness remain issues in the downtown area.To the north and east of downtown is the older residential area of Concord, with many homes dating back to before World War II. In the far northern edge of town is a primarily industrial area, dominated by the Tesoro Golden Eagle refinery (which is actually not located within city limits). The southeastern area of the city, centered along Clayton Road, is primarily residential and was mostly developed in the 1960s and 1970s. In the southwest area of the city is the primarily Latino neighborhood known as Four Corners, centered around the intersection of Monument Boulevard and Oak Grove Road.Concord is bordered on the west by Pleasant Hill and the unincorporated community of Pacheco, on the south by Walnut Creek, on the southeast by Clayton, on the northeast by Pittsburg and the unincorporated community of Bay Point, and on the north by the unincorporated community of Clyde. Though it shares no border with Concord, Martinez (the county seat) is located almost immediately adjacent to Concord on the northwest.