3375 S. Rainbow Blvd.
No matter the time of day, visitors can count on company, in the form of long waiting lines. (Rhetorical aside: Why do the powers that be bother building so many counter windows when the windows are never all manned at once?) There's proof to back up the readers' verdict: The Postal Service is building another post office to serve Spring Valley, in the southwest part of town, on Jones Boulevard near Flamingo Road. Your second choice was the main post office at 1001 E. Sunset Road.