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Polk County Historical Age Data

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ACS 2010-2014 data

Total population: 445,136

Median Age (see rank)

Polk County	34.90 years old
Iowa	38.00 years old
U.S.	37.40 years old

Median Age, Male (see rank)

Polk County	34.00 years old
Iowa	36.70 years old
U.S.	36.10 years old

Median Age, Female (see rank)

Polk County	35.80 years old
Iowa	39.40 years old
U.S.	38.80 years old

	Polk County	% of the Total Population	Iowa	U.S.
Under 5 years	32,833	7.38%, see rank	6.39%	6.36%
5 to 9 years	32,291	7.25%, see rank	6.62%	6.51%
10 to 14 years	30,382	6.83%, see rank	6.58%	6.59%
15 to 19 years	28,481	6.40%, see rank	6.96%	6.85%
20 to 24 years	29,254	6.57%, see rank	7.21%	7.13%
25 to 34 years	70,295	15.79%, see rank	12.65%	13.47%
35 to 44 years	60,714	13.64%, see rank	11.80%	12.96%
45 to 54 years	60,597	13.61%, see rank	13.73%	14.09%
55 to 64 years	50,443	11.33%, see rank	12.80%	12.29%
65 to 74 years	27,747	6.23%, see rank	7.81%	7.64%
75 to 84	15,226	3.42%, see rank	4.98%	4.25%
85 years and over	6,873	1.54%, see rank	2.48%	1.85%

US Census 2010 data

Total population: 430,640

Median Age (see rank)

Polk County	34.70 years old
Iowa	38.10 years old
U.S.	37.20 years old

Median Age, Male (see rank)

Polk County	33.70 years old
Iowa	36.60 years old
U.S.	35.80 years old

Median Age, Female (see rank)

Polk County	35.60 years old
Iowa	39.50 years old
U.S.	38.50 years old

	Polk County	% of the Total Population	Iowa	U.S.
Under 5 years	32,816	7.62%, see rank	6.63%	6.54%
5 to 9 years	30,863	7.17%, see rank	6.59%	6.59%
10 to 14 years	29,445	6.84%, see rank	6.59%	6.70%
15 to 19 years	27,808	6.46%, see rank	7.12%	7.14%
20 to 24 years	28,867	6.70%, see rank	7.00%	6.99%
25 to 34 years	67,498	15.67%, see rank	12.56%	13.30%
35 to 44 years	59,525	13.82%, see rank	11.97%	13.30%
45 to 54 years	60,299	14.00%, see rank	14.43%	14.58%
55 to 64 years	46,974	10.91%, see rank	12.24%	11.82%
65 to 74 years	24,750	5.75%, see rank	7.37%	7.03%
75 to 84	15,081	3.50%, see rank	5.04%	4.23%
85 years and over	6,714	1.56%, see rank	2.45%	1.78%

ACS 2008-2012 data

Total population: 431,811

Median Age (see rank)

Polk County	34.70 years old
Iowa	38.00 years old
U.S.	37.20 years old

Median Age, Male (see rank)

Polk County	33.80 years old
Iowa	36.60 years old
U.S.	35.80 years old

Median Age, Female (see rank)

Polk County	35.70 years old
Iowa	39.40 years old
U.S.	38.50 years old

	Polk County	% of the Total Population	Iowa	U.S.
Under 5 years	32,637	7.56%, see rank	6.53%	6.51%
5 to 9 years	31,501	7.30%, see rank	6.58%	6.57%
10 to 14 years	28,891	6.69%, see rank	6.60%	6.68%
15 to 19 years	27,741	6.42%, see rank	7.14%	7.09%
20 to 24 years	28,885	6.69%, see rank	7.08%	7.04%
25 to 34 years	67,899	15.72%, see rank	12.55%	13.32%
35 to 44 years	59,940	13.88%, see rank	12.02%	13.34%
45 to 54 years	59,974	13.89%, see rank	14.28%	14.44%
55 to 64 years	47,302	10.95%, see rank	12.27%	11.84%
65 to 74 years	25,201	5.84%, see rank	7.45%	7.12%
75 to 84	15,278	3.54%, see rank	5.08%	4.25%
85 years and over	6,562	1.52%, see rank	2.42%	1.78%

ACS 2006-2010 data

Total population: 419,301

Median Age (see rank)

Polk County	34.80 years old
Iowa	38.00 years old
U.S.	36.90 years old

Median Age, Male (see rank)

Polk County	33.70 years old
Iowa	36.60 years old
U.S.	35.60 years old

Median Age, Female (see rank)

Polk County	35.70 years old
Iowa	39.30 years old
U.S.	38.10 years old

	Polk County	% of the Total Population	Iowa	U.S.
Under 5 years	32,246	7.69%, see rank	6.56%	6.62%
5 to 9 years	29,958	7.14%, see rank	6.57%	6.62%
10 to 14 years	28,125	6.71%, see rank	6.64%	6.79%
15 to 19 years	27,155	6.48%, see rank	7.28%	7.28%
20 to 24 years	28,439	6.78%, see rank	7.14%	6.98%
25 to 34 years	65,122	15.53%, see rank	12.25%	13.22%
35 to 44 years	60,222	14.36%, see rank	12.56%	13.89%
45 to 54 years	59,131	14.10%, see rank	14.61%	14.57%
55 to 64 years	43,788	10.44%, see rank	11.58%	11.28%
65 to 74 years	23,435	5.59%, see rank	7.21%	6.74%
75 to 84	15,294	3.65%, see rank	5.24%	4.30%
85 years and over	6,386	1.52%, see rank	2.36%	1.70%

ACS 2005-2009 data

Total population: 415,949

Median Age (see rank)

Polk County	34.60 years old
Iowa	37.90 years old
U.S.	36.50 years old

Median Age, Male (see rank)

Polk County	33.60 years old
Iowa	36.50 years old
U.S.	35.20 years old

Median Age, Female (see rank)

Polk County	35.50 years old
Iowa	39.30 years old
U.S.	37.90 years old

	Polk County	% of the Total Population	Iowa	U.S.
Under 5 years	33,084	7.95%, see rank	6.61%	6.92%
5 to 9 years	28,635	6.88%, see rank	6.38%	6.59%
10 to 14 years	27,732	6.67%, see rank	6.59%	6.83%
15 to 19 years	25,960	6.24%, see rank	7.37%	7.15%
20 to 24 years	27,167	6.53%, see rank	7.65%	7.02%
25 to 34 years	67,760	16.29%, see rank	11.90%	13.42%
35 to 44 years	59,778	14.37%, see rank	12.95%	14.18%
45 to 54 years	58,248	14.00%, see rank	14.71%	14.48%
55 to 64 years	41,482	9.97%, see rank	11.11%	10.81%
65 to 74 years	23,037	5.54%, see rank	7.05%	6.50%
75 to 84	16,518	3.97%, see rank	5.30%	4.40%
85 years and over	6,548	1.57%, see rank	2.38%	1.71%

US Census 2000 data

Total population: 374,601

Median Age (see rank)

Polk County	34.40 years old
Iowa	36.60 years old
U.S.	35.30 years old

Median Age, Male (see rank)

Polk County	33.20 years old
Iowa	35.20 years old
U.S.	34.00 years old

Median Age, Female (see rank)

Polk County	35.50 years old
Iowa	38.00 years old
U.S.	36.50 years old

	Polk County	% of the Total Population	Iowa	U.S.
Under 5 years	27,955	7.46%, see rank	6.44%	6.81%
5 to 9 years	27,210	7.26%, see rank	6.92%	7.30%
10 to 14 years	25,945	6.93%, see rank	7.19%	7.29%
15 to 19 years	25,121	6.71%, see rank	7.74%	7.18%
20 to 24 years	25,448	6.79%, see rank	6.96%	6.74%
25 to 34 years	59,222	15.81%, see rank	12.41%	14.18%
35 to 44 years	61,277	16.36%, see rank	15.21%	16.04%
45 to 54 years	50,606	13.51%, see rank	13.42%	13.39%
55 to 64 years	30,065	8.03%, see rank	8.80%	8.63%
65 to 74 years	21,485	5.74%, see rank	7.24%	6.54%
75 to 84	14,712	3.93%, see rank	5.44%	4.39%
85 years and over	5,555	1.48%, see rank	2.23%	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.