There are 190 United States Postal Service post boxes and offices available to the public in Boulder County. You can use any one of these locations to mail your letter or package via USPS. For additional collection boxes in neighboring communities, see the list of mailboxes in Colorado.
Post Offices and Mailboxes in Colorado
Where to buy postage stamps in Boulder County, CO
Now you can print postage immediately using your home printer. Avoid trips to the Post Office. Print USPS postage online with Stamps.com. Get a 4 week trial if you Start Now.