Brentford is located at (45.159216, -98.323267).
There were 28 households out of which 35.7% had children under the age of 18 living with them, 57.1% were married couples living together, 3.6% had a female householder with no husband present, and 35.7% were non-families. 25.0% of all households were made up of individuals and 7.1% had someone living alone who was 65 years of age or older. The average household size was 2.32 and the average family size was 2.83.
In the town the population was spread out with 26.2% under the age of 18, 7.7% from 18 to 24, 27.7% from 25 to 44, 24.6% from 45 to 64, and 13.8% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 124.1 males. For every 100 females age 18 and over, there were 108.7 males.
The median income for a household in the town was $55,625, and the median income for a family was $64,375. Males had a median income of $37,500 versus $50,625 for females. The per capita income for the town was $21,921. There were no families and 11.3% of the population living below the poverty line, including no under eighteens and none of those over 64.