The Upstate is the region in the westernmost part of South Carolina, United States, also known as the Upcountry, which is the historical term. Although loosely defined among locals, the general definition includes the ten counties of the commerce-rich I-85 corridor in the northwest corner of South Carolina. The region's population was 1,438,550 as of 2013. Situated between Atlanta and Charlotte, the Upstate is the fastest-growing region of South Carolina. After BMW's initial investment, foreign companies, including others from Germany have a substantial presence in the Upstate; several large corporations have established regional, national, or continental headquarters in the area. Greenville is the largest city in the region with an urban population of 400,492, and it's the base of most commercial activity.