Located in the South Bay region of San Diego County, California, National City is the second-oldest city in San Diego County. National City was incorporated in 1887 and the population is estimated to be around 50000 residents. National City is known for its rich culture, history and outstanding architecture. The city attracts tourists from all over the world due to its museums and to ... https://accesscontrolsecurity.com/best-basis-certified-security-guard-company-in-national-city-and-imperial-beach-ca/