The point at which a child becomes an adolescent is defined by the onset of puberty or by the beginning of the teenage stage. Adolescence is also viewed as ending with the teenage stage. However, in some individuals (particularly females), puberty begins in the preadolescence years.
Grundy County, Illinois. Grundy County is a county located in the U.S. state of Illinois. According to the 2010 census, it has a population of 50,063. Its county seat is Morris. Grundy County is part of the Chicago-Naperville-Elgin, IL-IN-WI Metropolitan Statistical Area.
Whiteside County, Illinois 2017 Population Estimate â 56,121 The Illinois Department of Public Health projects the Whiteside County 2015 population as 56,691 people and the 2020 population as 55,267. If we assume that the population changes linearly between 2015 and 2020, then the Whiteside County 2017 population would be 56,121. Note: this value is a projection, not a count. The 2010 Decennial Census provides the most recent count of the Whiteside County population as 58,498 people.