Who was the most famous writer in United States?

There have been many famous writers in the United States, and it is difficult to say who is the most famous. Some of the most well-known and influential American writers include:

* Mark Twain: Mark Twain is one of the most iconic American writers. His works, such as "The Adventures of Tom Sawyer" and "The Adventures of Huckleberry Finn", are considered classics of American literature.

* Ernest Hemingway: Ernest Hemingway is another highly influential American writer. His works, such as "The Old Man and the Sea" and "A Farewell to Arms", are known for their sparse, direct style of writing.

* F. Scott Fitzgerald: F. Scott Fitzgerald is best known for his novel "The Great Gatsby", which is considered one of the greatest American novels ever written. Fitzgerald's works often explore themes of the American Dream and the Jazz Age.

* Harper Lee: Harper Lee is an American writer best known for her novel "To Kill a Mockingbird", which is considered a classic of American literature. The novel deals with themes of racial injustice and morality.

* J.D. Salinger: J.D. Salinger is an American writer best known for his novel "The Catcher in the Rye", which is considered a classic of American literature. The novel tells the story of a teenage boy's search for meaning in life.

These are just a few examples of the many famous writers who have emerged from the United States. There are many other talented writers who have contributed to the rich literary heritage of the country.