Olive Branch, North Carolina is an unincorporated community located outside the town of Marshville, North Carolina which is located in Union County. Olive Branch is a rural area where the biggest industry is farming. There are no "neighborhoods" located in Olive Branch. Houses are typically at least 0.5 mile apart. There is one gas station, which also services cars and changes oil. The store was locally owned until 2006 when it was bought out by a chain of stores.