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Ellington's town beach, Sandy Beach
CRYSTAL LAKE CONNECTICUT Latitude and Longitude:
|• Total||8.1 sq mi (21 km2)|
|• Land||7.8 sq mi (20 km2)|
|• Water||0.3 sq mi (0.8 km2)|
|• Density||240/sq mi (93/km2)|
According to the United States Census Bureau, the CDP has a total area of 20.9 km² (8.1 mi²). 20.2 km² (7.8 mi²) of it is land and 0.7 km² (0.3 mi²) of it (3.35%) is water.
As of the census  of 2000, there were 1,459 people, 552 households, and 421 families residing in the CDP. The population density was 72.2/km² (187.1/mi²). There were 634 housing units at an average density of 31.4/km² (81.3/mi²). The racial makeup of the CDP was 97.67% White, 0.41% African American, 0.07% Native American, 0.82% Asian, 0.21% from other races, and 0.82% from two or more races. Hispanic or Latino of any race were 1.03% of the population.
There were 552 households out of which 36.1% had children under the age of 18 living with them, 64.3% were married couples living together, 7.6% had a female householder with no husband present, and 23.7% were non-families. 17.2% of all households were made up of individuals and 5.3% had someone living alone who was 65 years of age or older. The average household size was 2.64 and the average family size was 3.00.
In the CDP, the population was spread out with 26.3% under the age of 18, 4.0% from 18 to 24, 34.3% from 25 to 44, 25.7% from 45 to 64, and 9.7% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 100.4 males. For every 100 females age 18 and over, there were 100.6 males.
The median income for a household in the CDP was $61,897, and the median income for a family was $69,375. Males had a median income of $46,393 versus $36,944 for females. The per capita income for the CDP was $24,645. About 5.6% of families and 7.9% of the population were below the poverty line, including 13.2% of those under age 18 and 2.8% of those age 65 or over.
- CAES: Crystal Lake, Ellington - Invasive Aquatic Plant Program
- "Crystal Lake (lake)". Geographic Names Information System. United States Geological Survey.