Lunca Mureșului has an area of 31.35 km² and is located on the Mureș River, in the north-east corner of Alba County, approximately 10 km from the town of Ocna Mureș on the Romanian County Road 107F, 20 kilometers from the towns of Câmpia Turzii and Luduș, and 60 km from the county capital, Alba Iulia.