The Golden Triangle is an economic region in Kentucky which contains most of the state's population, wealth and economic growth. The Commonwealth of Kentucky ( is a state located in the East Central United States of America. In 2005 the Triangle had an estimated population of 2,253,876; which is 54% of Kentucky's population on 22% of the state's land area. The area refers to the triangular shaped area outlined by Lexington, Louisville and Cincinnati/NKY. Lexington (officially Lexington-Fayette Urban County is the second-largest city in Kentucky and the 68th largest in the United States.