McClintock Insurance Inc Share: Insurance McClintock Insurance Inc Visit Website PO Box 3627 Sioux City, IA 51102-3627 (712) 277-4600 (712) 277-3015 (fax) About Map About We are an independent insurance agency that represents insurance products with a large variety of companies. What's Nearby? Distance: 5 10 15 20 25 50 mi.