Bergen County is
the most populous county of the state of New Jersey,
United States. As of the 2000 Census, the population
is 884,118. It is part of the New York Metropolitan
Area. Its county seat is Hackensack.
Bergen County ranks as the 21st among the highest-income
counties in the United States with a per capita income
According to the U.S. Census Bureau, the county
has a total area of 639 km² (247 mi²).
606 km² (234 mi²) of it is land and 33
km² (13 mi²) of it (5.12%) is water.
The highest elevation is Bald Mountain near the New
York state line in Mahwah, at 1,164 feet (355 m) above
sea level. The lowest point is sea level, along the
The sharp cliffs of the New Jersey Palisades lift
much the county up from the river along the eastern
boundary with the Hudson River, but then relief remains
relatively minimal across the county as much of it
is in the Hackensack River valley. Only in the northwestern
portion of the county are any serious hills found,
leading to the Ramapo Mountains. The damming of the
Hackensack River (and tributaries) produced three reservoirs
in the county, Woodcliff Lake Reservoir, Lake Tappan
and Oradell Reservoir, which provide drinking water
to much of northern New Jersey. The Hackensack River
drains through the New Jersey Meadowlands, a wetlands
area in the southern portion of the county.
Bergen County is bordered by Rockland County, New
York to the north, by Westchester County, the Bronx,
and Manhattan in New York, across the Hudson River
to the east, Hudson County to the south, a small border
with Essex County also to the south and Passaic County
to the west.