sentences:  Its county seat is Taylorsville.Alexander County is part of the Hickory–Lenoir–Morganton, NC Metropolitan Statistical Area.Alexander County was formed in 1847 from portions of what were then Iredell (formed in 1788 from Rowan County), Caldwell (formed from Burke County in 1841), and Wilkes (formed from Surry County and Washington District in 1771) counties.