Helena–West Helena is the county seat of and the largest city within Phillips County, Arkansas, United States. The current city was consolidated, effective January 1, 2006, from the two Arkansas cities of Helena and West Helena. Helena is sited on lowlands between the Mississippi River and the eastern side of Crowley's Ridge. West Helena is located on the western side of Crowley's Ridge, a geographic anomaly in the typically flat Arkansas Delta. The Helena Bridge, one of Arkansas's four Mississippi River bridges, carries U.S. Route 49 across to Mississippi. The combined population of the two cities was 15,012 at the 2000 census and at the 2010 census, the official population was 12,282.