There are 28 US Post Offices in Washington County serving a total of 32,669 residents equating to 1,167 residents per post office. It's estimated that approximately 52,143 packages are handled across the 28 county post offices annually. Washington County is a county located in the U.S. state of Maine. As of the 2010 census, its population was 32,856, making it the third-least populous county in Maine. Its county seat is Machias. The county was established on June 25, 1789. It borders the Canadian province of New Brunswick. It is sometimes referred to as \"Sunrise County\" because it includes the easternmost point in the United States, and claims have been made that Washington County is where the sun first rises on the 48 contiguous states. Many small seaside communities have small-scale fishing-based economies. Tourism is also important along the county's shoreline, but it is not as important as elsewhere in the state. The blueberry crop plays a major role in the county's economy."