The United States Postal Service branch on Cañon Street serves Point Loma, San Diego's 92106 peninsula with over-the-counter mail services, parcel shipping, and money-order processing from a walk-in lobby near Shelter Island. This location handles certified mail, registered mail, Priority Mail Express, and international dispatch, while peninsula residents who need private street addresses, multi-carrier acceptance, or notary services turn to Mail Boxes Express at the Rosecrans–Shelter Island intersection. The branch shares Cañon Street with residential Point Loma and the southern end of the Rosecrans commercial corridor, positioning it as the primary USPS access point for the Shelter Island, Fleetridge, and Loma Portal sub-neighborhoods. Post office box rentals provide a secure alternative to curbside delivery for the area's older housing stock, where many properties lack enclosed mailboxes. Package-receiving and hold-for-pickup services complement the forwarding capabilities offered by Mail Call on Shelter Island Drive, which extends the mail-management chain for boaters and seasonal residents who need correspondence redirected to out-of-state addresses. The highest-volume counter transactions are bulk-rate business mailings and certified-return-receipt dispatches for the legal and real-estate offices clustered along Rosecrans Street.