The post offices of Red Bank, 1846-1855, Martin's Creek, 1855-1892, and Martin Creek, 1892-1907 would have been in Lawrence County at the time of the civil war. All three as they changed names and dates would be in what became Sharp County in 1868. The Martin Creek post office of 1892-1907 was always in Sharp County, as it was established after 1868. The Martin's Creek postoffice of 1855-1892 would have spent time in both counties.