Ethel Lynn Beers (born Ethelinda Eliot; January 13, 1827 – October 11, 1879) was an American poet best known for her patriotic and sentimental Civil War poem "All Quiet Along the Potomac Tonight".
When she began writing and publishing, she signed her name as "Ethel Lynn" because she thought her last name was too "tame and commonplace".
Her most famous poem, "All Quiet Along the Potomac Tonight", first appeared in Harper's Weekly on November 30, 1861, under the title "The Picket Guard".
She feared publishing her collected works as she thought she would die after its publication, a premonition which came true.
The day after the publication of All Quiet Along the Potomac and Other Poems, she died in Orange, New Jersey, aged 52.