There are two US Post Offices in Lake Forest.

U.S. Post Office - El Toro
24552 Raymond Way
Lake Forest, CA 92630-9998
1-800-275-8777 

7:30 am – 6:30 pm M-F
9:00 am – 3:00 pm Sat 

U.S. Post Office - Rite Price
23653 EL Toro RD
Lake Forest, CA 92630-4775
1-800-275-8777

9:00 am – 6:00 pm M-F
9:00 am – 2:00 pm Sat