The 29 Star Flag 1847 
          
          
        This Flag became the Official United States Flag on July 4th, 1847. A star was added for the admission of 
        
          - (29th) Iowa - December 28, 1846 
 
        
        This was the official flag for only 1 year. The only President to serve under this flag was James Polk  (1845-1849).