Late adulthood is seen as the last period in individual cycle of life. It begins from the age of 65 till death. Late adulthood is one of the most challenging periods in life as individuals tends to lose most of the physical, cognitive and social development that have been gained throughout life. Few individuals make it through late adulthood without the support of other and like childhood, late adulthood has also been described as a dependency period. In Erickson stages of life, late adulthood is a period of resolving conflict between integrity vs. despair. The three main theories describing the aging process include disengagement theory and activity theory. There are different physical, cognitive, and social changes that take place in the individual signing the offset of late adulthood. This paper will explore in details the different physical, cognitive and social changes and the major process that contribute to aging process in late adulthood.