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Lake Forest, IL Historical Age Data

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ACS 2010-2014 data

Total population: 18,914

Median Age (see rank)

Lake Forest, IL	46.90 years old
Illinois	37.00 years old
U.S.	37.40 years old

Median Age, Male (see rank)

Lake Forest, IL	46.30 years old
Illinois	35.70 years old
U.S.	36.10 years old

Median Age, Female (see rank)

Lake Forest, IL	48.00 years old
Illinois	38.40 years old
U.S.	38.80 years old

	Lake Forest, IL	% of the Total Population	Illinois	U.S.
Under 5 years	795	4.20%, see rank	6.30%	6.36%
5 to 9 years	1,270	6.71%, see rank	6.58%	6.51%
10 to 14 years	1,579	8.35%, see rank	6.71%	6.59%
15 to 19 years	1,678	8.87%, see rank	6.94%	6.85%
20 to 24 years	1,016	5.37%, see rank	6.95%	7.13%
25 to 34 years	838	4.43%, see rank	13.84%	13.47%
35 to 44 years	1,739	9.19%, see rank	13.20%	12.96%
45 to 54 years	3,289	17.39%, see rank	14.17%	14.09%
55 to 64 years	3,116	16.47%, see rank	12.13%	12.29%
65 to 74 years	1,930	10.20%, see rank	7.18%	7.64%
75 to 84	1,163	6.15%, see rank	4.10%	4.25%
85 years and over	501	2.65%, see rank	1.90%	1.85%

US Census 2010 data

Total population: 19,375

Median Age (see rank)

Lake Forest, IL	45.50 years old
Illinois	36.60 years old
U.S.	37.20 years old

Median Age, Male (see rank)

Lake Forest, IL	45.00 years old
Illinois	35.20 years old
U.S.	35.80 years old

Median Age, Female (see rank)

Lake Forest, IL	46.00 years old
Illinois	37.90 years old
U.S.	38.50 years old

	Lake Forest, IL	% of the Total Population	Illinois	U.S.
Under 5 years	762	3.93%, see rank	6.51%	6.54%
5 to 9 years	1,375	7.10%, see rank	6.70%	6.59%
10 to 14 years	1,775	9.16%, see rank	6.85%	6.70%
15 to 19 years	1,849	9.54%, see rank	7.19%	7.14%
20 to 24 years	1,184	6.11%, see rank	6.85%	6.99%
25 to 34 years	729	3.76%, see rank	13.84%	13.30%
35 to 44 years	1,847	9.53%, see rank	13.45%	13.30%
45 to 54 years	3,511	18.12%, see rank	14.58%	14.58%
55 to 64 years	2,964	15.30%, see rank	11.48%	11.82%
65 to 74 years	1,680	8.67%, see rank	6.62%	7.03%
75 to 84	1,143	5.90%, see rank	4.09%	4.23%
85 years and over	556	2.87%, see rank	1.83%	1.78%

ACS 2008-2012 data

Total population: 19,068

Median Age (see rank)

Lake Forest, IL	46.30 years old
Illinois	36.60 years old
U.S.	37.20 years old

Median Age, Male (see rank)

Lake Forest, IL	45.80 years old
Illinois	35.30 years old
U.S.	35.80 years old

Median Age, Female (see rank)

Lake Forest, IL	46.80 years old
Illinois	38.00 years old
U.S.	38.50 years old

	Lake Forest, IL	% of the Total Population	Illinois	U.S.
Under 5 years	690	3.62%, see rank	6.50%	6.51%
5 to 9 years	1,520	7.97%, see rank	6.68%	6.57%
10 to 14 years	1,613	8.46%, see rank	6.82%	6.68%
15 to 19 years	1,606	8.42%, see rank	7.16%	7.09%
20 to 24 years	1,016	5.33%, see rank	6.88%	7.04%
25 to 34 years	834	4.37%, see rank	13.84%	13.32%
35 to 44 years	1,866	9.79%, see rank	13.49%	13.34%
45 to 54 years	3,280	17.20%, see rank	14.46%	14.44%
55 to 64 years	3,108	16.30%, see rank	11.52%	11.84%
65 to 74 years	1,764	9.25%, see rank	6.71%	7.12%
75 to 84	1,206	6.32%, see rank	4.11%	4.25%
85 years and over	565	2.96%, see rank	1.83%	1.78%

ACS 2006-2010 data

Total population: 19,397

Median Age (see rank)

Lake Forest, IL	45.50 years old
Illinois	36.20 years old
U.S.	36.90 years old

Median Age, Male (see rank)

Lake Forest, IL	45.20 years old
Illinois	34.90 years old
U.S.	35.60 years old

Median Age, Female (see rank)

Lake Forest, IL	45.80 years old
Illinois	37.60 years old
U.S.	38.10 years old

	Lake Forest, IL	% of the Total Population	Illinois	U.S.
Under 5 years	774	3.99%, see rank	6.63%	6.62%
5 to 9 years	1,418	7.31%, see rank	6.78%	6.62%
10 to 14 years	1,536	7.92%, see rank	6.94%	6.79%
15 to 19 years	1,917	9.88%, see rank	7.31%	7.28%
20 to 24 years	1,112	5.73%, see rank	6.86%	6.98%
25 to 34 years	794	4.09%, see rank	13.78%	13.22%
35 to 44 years	2,035	10.49%, see rank	13.96%	13.89%
45 to 54 years	3,417	17.62%, see rank	14.55%	14.57%
55 to 64 years	2,795	14.41%, see rank	10.89%	11.28%
65 to 74 years	1,610	8.30%, see rank	6.36%	6.74%
75 to 84	1,420	7.32%, see rank	4.17%	4.30%
85 years and over	569	2.93%, see rank	1.77%	1.70%

ACS 2005-2009 data

Total population: 21,063

Median Age (see rank)

Lake Forest, IL	43.30 years old
Illinois	35.90 years old
U.S.	36.50 years old

Median Age, Male (see rank)

Lake Forest, IL	43.50 years old
Illinois	34.60 years old
U.S.	35.20 years old

Median Age, Female (see rank)

Lake Forest, IL	43.10 years old
Illinois	37.20 years old
U.S.	37.90 years old

	Lake Forest, IL	% of the Total Population	Illinois	U.S.
Under 5 years	860	4.08%, see rank	6.97%	6.92%
5 to 9 years	1,779	8.45%, see rank	6.76%	6.59%
10 to 14 years	1,765	8.38%, see rank	6.96%	6.83%
15 to 19 years	2,239	10.63%, see rank	7.24%	7.15%
20 to 24 years	1,366	6.49%, see rank	7.08%	7.02%
25 to 34 years	667	3.17%, see rank	13.73%	13.42%
35 to 44 years	2,479	11.77%, see rank	14.23%	14.18%
45 to 54 years	3,575	16.97%, see rank	14.47%	14.48%
55 to 64 years	2,898	13.76%, see rank	10.43%	10.81%
65 to 74 years	1,682	7.99%, see rank	6.21%	6.50%
75 to 84	1,306	6.20%, see rank	4.17%	4.40%
85 years and over	447	2.12%, see rank	1.74%	1.71%

US Census 2000 data

Total population: 20,059

Median Age (see rank)

Lake Forest, IL	41.00 years old
Illinois	34.70 years old
U.S.	35.30 years old

Median Age, Male (see rank)

Lake Forest, IL	40.90 years old
Illinois	33.30 years old
U.S.	34.00 years old

Median Age, Female (see rank)

Lake Forest, IL	41.00 years old
Illinois	36.00 years old
U.S.	36.50 years old

	Lake Forest, IL	% of the Total Population	Illinois	U.S.
Under 5 years	1,189	5.93%, see rank	7.06%	6.81%
5 to 9 years	1,604	8.00%, see rank	7.49%	7.30%
10 to 14 years	1,727	8.61%, see rank	7.29%	7.29%
15 to 19 years	1,757	8.76%, see rank	7.20%	7.18%
20 to 24 years	1,168	5.82%, see rank	6.85%	6.74%
25 to 34 years	1,057	5.27%, see rank	14.59%	14.18%
35 to 44 years	2,904	14.48%, see rank	15.97%	16.04%
45 to 54 years	3,488	17.39%, see rank	13.10%	13.39%
55 to 64 years	2,240	11.17%, see rank	8.38%	8.63%
65 to 74 years	1,485	7.40%, see rank	6.22%	6.54%
75 to 84	1,103	5.50%, see rank	4.31%	4.39%
85 years and over	337	1.68%, see rank	1.55%	1.51%

* ACS stands for U.S. Census American Community Survey. According to the U.S. Census, if the date is a range, you can interpret the data as an average of the period of time.