As of the census of 2000, there were 47,683 people, 19,017 households, and 12,075 families residing in the township. The population density was 8,961.5 people per square mile (3,460.6/km²). There were 19,508 housing units at an average density of 3,666.3/sq mi (1,415.8/km²). The racial makeup of the township was 70.09% White, 11.69% African American, 0.19% Native American, 8.38% Asian, 0.07% Pacific Islander, 6.42% from other races, and 3.16% from two or more races. Hispanic or Latino of any race were 14.47% of the population.
There were 19,017 households out of which 28.2% had children under the age of 18 living with them, 46.7% were married couples living together, 12.4% had a female householder with no husband present, and 36.5% were non-families. 30.4% of all households were made up of individuals and 10.6% had someone living alone who was 65 years of age or older. The average household size was 2.49 and the average family size was 3.16.
In the township the population was spread out with 21.1% under the age of 18, 8.4% from 18 to 24, 34.0% from 25 to 44, 22.3% from 45 to 64, and 14.3% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 90.8 males. For every 100 females age 18 and over, there were 87.1 males.
The median income for a household in the township was $53,289, and the median income for a family was $64,945 (these figures had risen to $65,373 and $83,321 respectively as of a 2007 estimate). Males had a median income of $43,498 versus $36,104 for females. The per capita income for the township was $26,049. About 4.4% of families and 5.9% of the population were below the poverty line, including 6.3% of those under age 18 and 8.2% of those age 65 or over.
In comparison to the other townships in the U.S., living in Bloomfield costs on average 24.01% higher than the U.S. average cost of living.
According to CNN Money the quality of life in Bloomfield in terms of crime are 3 incidents per 1,000 people as compared to the “best places to live average” of only 1.3 incidents per 1,000. Property crime incidents per 1,000 people in Bloomfield is 35 as compared to the “best places to live average” of only 20.6.
The major New Jersey highway artery that serves Bloomfield is the Garden State Parkway. Its Essex toll plaza is located in the city, as well as two service areas.
Bloomfield is served by the New Jersey Transit Montclair-Boonton Line to Hoboken Terminal or on Midtown Direct trains (about 55%) to Penn Station in Midtown Manhattan via the Secaucus Junction. The Bloomfield train station is located off of Bloomfield Avenue in the downtown area. The Watsessing Avenue rail station sits at the corner of Watsessing Avenue and Orange Street, and is located below ground.
The Grove Street station on the Newark City Subway provides service to Newark Penn Station.
New Jersey Transit bus service is available to Newark on the 11, 27, 28, 29, 34, 72, 90, 92, 93 and 94 routes, with local service on the 709 bus line.
Bloomfield is 12.37 miles from Newark Liberty International Airport in Newark / Elizabeth, and 28.8 miles from LaGuardia Airport in Flushing, Queens.