According to the United States Census Bureau, the balance has a total area of 61.5 km² (23.7 mi²). 57.7 km² (22.3 mi²) of it is land and 3.8 km² (1.5 mi²) of it is water. The total area is 6.15% water.
As of the census of 2000, there are 50,594 people, 20,138 households, and 13,613 families residing in the balance. The population density is 876.8/km² (2,270.7/mi²). There are 21,145 housing units at an average density of 366.4/km² (949.0/mi²). The racial makeup of the balance is 93.55% White, 1.91% African American, 0.13% Native American, 2.36% Asian, 0.03% Pacific Islander, 0.88% from other races, and 1.14% from two or more races. 3.34% of the population are Hispanic or Latino of any race.
There are 20,138 households out of which 29.3% have children under the age of 18 living with them, 54.7% are married couples living together, 9.7% have a female householder with no husband present, and 32.4% are non-families. 26.3% of all households are made up of individuals and 10.3% have someone living alone who is 65 years of age or older. The average household size is 2.49 and the average family size is 3.04.
In the balance the population is spread out with 22.4% under the age of 18, 5.9% from 18 to 24, 31.7% from 25 to 44, 25.0% from 45 to 64, and 14.9% who are 65 years of age or older. The median age is 39 years. For every 100 females there are 93.6 males. For every 100 females age 18 and over, there are 90.0 males.
The median income for a household in the balance is $61,167, and the median income for a family is $71,175. Males have a median income of $48,368 versus $36,770 for females. The per capita income for the balance is $28,773. 3.8% of the population and 2.4% of families are below the poverty line. Out of the total people living in poverty, 4.1% are under the age of 18 and 5.4% are 65 or older.
See also: Milford, New Haven County, Connecticut