Romans was written from Corinth while Paul was on his third missionary journey (Acts 18:23f). Paul’s third journey took him to Ephesus for two years and three months (Acts 19:1, 8-9). He left Ephesus and entered into Macedonia (Acts 20:1). Then, he visited Greece (i.e. Achaia, Acts 20:2). Corinth was located in Achaia. Paul remained at Corinth for three months (Acts 20:3), and during this time he wrote this letter. We know this because of the information in Rom. 16:23. Gaius was Paul’s host when this letter was written, and since Gaius lived in Corinth (1 Cor. 1:14), this letter was written from Corinth. Someone had to take this letter and the likely messenger was Phoebe (Rom. 16:1), a Christian who lived in Cenchrea (a seaport of Corinth).
Want to learn more about the book of Romans? Visit www.abiblecommentary.com for help!