Longmont Dairy Farm, Inc. Share: Dairy Home Delivery Longmont Dairy Farm, Inc. Visit Website 920 Coffman Longmont, CO 80501 303-776-8466 303-776-0503 (fax) www.longmontdairy.com About Map About Home delivery dairy service. What's Nearby? Distance: 5 10 15 20 25 50 mi.