The Thomson Reuters/University of Michigan final consumer sentiment index increased to 96.7 in June from 90.7 in May, beating the preliminary estimate of 94.6.
"Consumers voiced in the first half of 2015 the largest and most sustained increase in economic optimism since 2004. Consumer spending will remain the driving force of economic growth in 2015," the Surveys of Consumers chief economist at the University of Michigan Richard Curtin.
He adds that consumer spending could rise 3.0% in 2015.
The current economic conditions index soared to 108.9 in June from 100.8 in May.
The index of consumer expectations rose to 87.8 from 84.2.