Crystal Lake vs Duncan

A side-by-side comparison of Crystal Lake and Duncan: population, income, housing, and more.

Crystal Lake and Duncan are places in Iowa. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.

Crystal Lake has the higher population (229 vs 41 in Duncan). Since 2019, Crystal Lake's population has grown faster (-0.4% vs -65.5%).

Population, income & housing

	Crystal Lake	Duncan
Population	229	41
Median age	36.2 yrs	55.4 yrs
Median household income	$82,500	—
Median home value	$86,000	—
Median gross rent	$830	—
Housing units	113	14
Homeownership rate	87.0%	71.4%
Bachelor's degree or higher	10.4%	0.0%
Unemployment rate	2.5%	0.0%

Trends (ACS 5-year, 2019–2023)

	Crystal Lake	Duncan
Population	230 → 229 (-0.4%)	119 → 41 (-65.5%)
Median household income	$41,250 → $82,500 (+100.0%)	—
Median home value	$50,800 → $86,000 (+69.3%)	—
Median gross rent	$660 → $830 (+25.8%)	—

Crystal Lake

Population

230229

Median household income

$41,250$82,500

Median home value

$50,800$86,000

Median gross rent

$660$830

Duncan

Population

11941

Age & race/ethnicity

Age distribution (share)

	Crystal Lake	Duncan
Under 5	11.8%	0.0%
5 to 17	13.1%	0.0%
18 to 24	3.5%	22.0%
25 to 34	20.1%	24.4%
35 to 44	8.7%	0.0%
45 to 54	12.7%	0.0%
55 to 64	7.9%	9.8%
65 to 74	8.7%	19.5%
75 and over	13.5%	24.4%

Race & ethnicity (share)

	Crystal Lake	Duncan
White (non-Hispanic)	87.8%	100.0%
Black or African American	0.9%	0.0%
American Indian & Alaska Native	0.0%	0.0%
Asian	0.0%	0.0%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	0.0%	0.0%
Two or more races	1.3%	0.0%
Hispanic or Latino	10.0%	0.0%

Educational attainment (age 25+)

Share of adults 25+

	Crystal Lake	Duncan
No high school diploma	7.3%	31.3%
High school graduate	60.4%	68.8%
Some college or associate's	22.0%	0.0%
Bachelor's degree	7.9%	0.0%
Graduate or professional degree	2.4%	0.0%

Commute to work

How workers get to work (share)

	Crystal Lake	Duncan
Drove alone	75.7%	0.0%
Carpooled	18.3%	30.8%
Public transit	0.0%	0.0%
Walked	0.0%	69.2%
Bicycle	0.0%	0.0%
Worked from home	6.1%	0.0%
Other means	0.0%	0.0%

Housing

Units in structure (share)

	Crystal Lake	Duncan
1-unit, detached	91.2%	100.0%
1-unit, attached	0.0%	0.0%
2 to 4 units	0.9%	0.0%
5 to 19 units	1.8%	0.0%
20 or more units	0.0%	0.0%
Mobile home & other	6.2%	0.0%

Poverty & households

	Crystal Lake	Duncan
Poverty rate	10.9%	78.0%
Average household size	2.12	—
Mean commute (minutes)	32	—
Median year structure built	1948	—