Mattress Firm Longmont is located in Longmont CO, Zip Code: 80501 on the street of 225 Ken Pratt Blvd. If you want to ask something about the furniture, mattresses, catalog, pricing, hours and directions, the Phone number is 303-485-8940. The coordinates that you can use in navigation applications to find Mattress Firm Longmont quickly are 40.15099 -105.0947 USA