George I of Württemberg-Montbéliard, nicknamed "the Cautious" (4 February 1498 at Urach Castle in Bad Urach – 17 July 1558 at Kirkel Castle in Kirkel) was a son of Henry of Württemberg and his second wife, the Countess Eva of Salm.

On 2 September 1526, Ulrich sold him the County of Montbéliard and associated Lordships, with an option to buy it back.

In 1531, George joined the Protestant Schmalkaldic League against Emperor Charles V. With the help of Landgrave Philip I of Hesse, his brother Ulrich was able to regain power in Württemberg.

Ulrich re-purchased Montbéliard and in 1542, appointed his son Christopher as governor there.

In 1553, Christoper returned Montbéliard to his uncle George, who then ruled the county until his death in 1558.