Berkeley City Jail Address: 2100 Martin Luther King, Jr. Way, Berkeley, CA 94704 Phone: (510) 981-5766 Hours: 24/7. Visiting hours: Monday-Friday 4:30pm-6:00pm / Weekends and Holidays 1:00pm-3:00pm The Berkeley City Jail houses up to 40 detainees and is used for incarceration between arrest and arraignment.