United States Poet Laureate

The Poet Laureate Consultant in Poetry to the Library of Congress" is commonly referred to as the United States Poet Laureate". This person serves as the official poet of the United States. 
The position started in 1937. At first it was called the "Consultant in Poetry to the Library of Congress." It became "Poet Laureate Consultant in Poetry" by an Act of Congress in 1985.
In 1943 the Poet Laureate's job included these things:
In more recent times, the job includes organizing local poetry readings, lectures, conferences, and other programs.
The poet laureate is named between June and August of each year. Their active work goes from September to April. The poet laureate can be given a second term, but no more than that.
Lists of appointees.
Special Consultants in Poetry.
1999-2000 (for Library of Congress' 200th Anniversary) Rita Dove, Louise Glück, and W. S. Merwin