James A. Musick Facility is the current Orange County Sheriff’s jail at 13420 Alton Parkway, Irvine, CA 92618. The current official sheriff location page lists the main phone as (949) 855-2600 and reports a rated capacity of 896.
This refresh updates the address from the old Musick Road campus reference to the sheriff’s current Alton Parkway facility listing and clears stale legacy population metadata.

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