East Union is an unincorporated community in northwestern Stock Township, Noble County, Ohio, United States.[1] It lies at the intersection of State Route 78 with County Road 6. The headwaters of Buffalo Creek, a tributary of the Muskingum River through Wills Creek, are located around East Union. It is located 7 miles (10½ km) east of Caldwell, the county seat of Noble County.[2]