*Which is the world's highest post office?* The Hikkim Post Office in Spiti Valley, Himachal Pradesh, India, is the world's highest post office. It is located at an altitude of 4,440 meters (14,567 feet) above sea level.. #post office #📮📮World post office day📮📮 #incredible india #हिमाचल प्रदेश #himachal