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.
Population of Grundy County. Last official estimated population of Grundy County was 50,098 (year 2014)[1]. This was 0.016% of total US population and 0.4% of total Illinois state population. Area of Grundy County is 430.4 miÂ² (=1114.9 kmÂ²), in this year population density was 116.39 p/miÂ². If population growth rate would be same as in period 2010-2014 (+0.02%/yr), Grundy County population in 2017 would be 50,124 .
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.