Helena-West Helena is the county seat of and the largest city within Phillips County, Arkansas, United States. The current city represents a consolidation, effective on January 1, 2006, of the two Arkansas cities of Helena and West Helena. West Helena is located on the western side of Crowley's Ridge, a geographic anomaly of the typically flat Arkansas Delta. Helena is nestled between the Mississippi River and the eastern side of Crowley's Ridge. The Helena Bridge, one of Arkansas' four Mississippi River bridges, carries U.S. Route 49 across to Mississippi.