Five California Cities Could Lose Metropolitan Status 03/23/2021 - 5:00 AM By Brittany M. An MSA is defined as a city with a population of 50,000. The OMB is considering doubling that number to 100,000. Featured news MSAs Metropolitan Statistical Area chico napa san luis obispo Paso Robles madera hanford Corcoran Read more about Five California Cities Could Lose Metropolitan Status