The First Epistle to the Corinthians (Α΄ ᾽Επιστολὴ πρὸς Κορινθίους) is one of the Pauline epistles, part of the New Testament of the Christian Bible. The epistle is attributed to Paul the Apostle and a co-author, Sosthenes, and is addressed to the Christian church in Corinth. Scholars believe that Sosthenes was the amanuensis who wrote down the text of the letter at Paul's direction. It addresses various issues that had arisen in the Christian community at Corinth and is composed in a form of Koine Greek.
There is a consensus among historians and theologians that Paul is the author of the First Epistle to the Corinthians (AD 53–54). The letter is quoted or mentioned by the earliest of sources and is included in every ancient canon, including that of Marcion of Sinope. Some scholars point to the epistle's potentially embarrassing references to the existence of sexual immorality in the church as strengthening the case for the authenticity of the letter.