Lochsloy is located at 48°3'25" North, 122°1'56" West (48.057026, -122.032325)1 on Hwy 92 between Lake Stevens and Granite Falls.
According to the United States Census Bureau, the CDP has a total area of 16.1 km² (6.2 mi²). 16.1 km² (6.2 mi²) of it is land and none of the area is covered with water.
As of the census of 2000, there are 2,135 people, 739 households, and 586 families residing in the CDP. The population density is 132.5/km² (343.5/mi²). There are 754 housing units at an average density of 46.8/km² (121.3/mi²). The racial makeup of the CDP is 95.88% White, 0.28% African American, 0.80% Native American, 0.75% Asian, 0.14% Pacific Islander, 0.61% from other races, and 1.55% from two or more races. 2.34% of the population are Hispanic or Latino of any race.
There are 739 households out of which 39.9% have children under the age of 18 living with them, 66.7% are married couples living together, 6.9% have a female householder with no husband present, and 20.7% are non-families. 14.9% of all households are made up of individuals and 3.9% have someone living alone who is 65 years of age or older. The average household size is 2.89 and the average family size is 3.20.
In the CDP the population is spread out with 28.0% under the age of 18, 6.7% from 18 to 24, 30.1% from 25 to 44, 27.9% from 45 to 64, and 7.4% who are 65 years of age or older. The median age is 38 years. For every 100 females there are 104.9 males. For every 100 females age 18 and over, there are 105.9 males.
The median income for a household in the CDP is $52,375, and the median income for a family is $57,350. Males have a median income of $45,313 versus $33,056 for females. The per capita income for the CDP is $23,770. 5.0% of the population and 1.0% of families are below the poverty line. Out of the total people living in poverty, 8.1% are under the age of 18 and 1.2% are 65 or older.