Located in the San Joaquin Ranch House, the museum was commissioned by James Irvine in 1868 and considered the oldest standing structure within the original boundaries of Irvine Ranch. Built for $1,300, the home was the first wooden house to be erected between Anaheim and San Diego. A research library and extensive photo collection of local historic information are available.

Standard hours of operation are Tuesday and Sunday from 1 to 4 ; closed holidays.

Members are free; a $1.00 donation per non-member is appreciated.

One-hour walking tours of Old Town Irvine are available on the first Sunday of each month at 11:30 a.m. Free for members; $5 for non-members.