In a Langen boundary description, was mentioned about 834, making Offenthal the oldest settlement in the Dreieich area after Sprendlingen. The Counts of Isenburg owned Offenthal as of 1489. As an important building monument, the Gothic church of Offenthal has been preserved. It was endowed about 1400 and thereby belongs among the Offenbach district’s oldest churches. After the Reformation’s introduction in 1528, the parish became Lutheran. Beginning in 1596, attempts were made to introduce Calvinism. In 1816, Offenthal became Hessian. In 1834 the community had 441 inhabitants, and by 1977 this had grown to 5.142.