New Jersey is a state within the United States of America that lies on the eastern edge of the North American continent.

The State of New Jersey shares a land border with the state of State of New York along the north. Along the east, New Jersey is flanked by the Atlantic Ocean, and is separated from New York, in particular the boroughs of the Bronx and Manhattan in New York City by the Hudson River, and from Staten Island by the Kill van Kull and the Arthur Kill. On its west, New Jersey is flanked by the Delaware River that forms its border with the Commonwealth of Pennsylvania and Delaware Bay which separates New Jersey from the State of Delaware. However, due to a fluke in a colonial land grant for the city of New Castle, Delaware (called The Twelve-Mile Circle), the state of Delaware possesses a small amount of land in New Jersey at Finns Point and a pier near Penns Grove, both adjacent to Salem County.

New Jersey's geography has contributed largely to its development, its economy and its rich history.

Area

New Jersey is ranked 47th of the fifty states that comprise the United States of America in terms of area. The total area of the state is 8,729 square miles, of which 14.9% or 1,304 square miles is water, and 85.1%, or 7,425 square miles, is land. New Jersey spans 70 miles (110 km) at its widest, and 130 miles (240 km) in length.

Due to its small size, New Jersey, which ranks tenth in the nation in terms of population with 8,414,350 people, ranks first in population density, with 1,134 people per square mile. However, while this offers the impression that New Jersey is entirely urban or suburban, it is not. Large swaths of northwestern and southern New Jersey are extremely rural. For example, Walpack Township in Sussex County, has a population of only 39 and an area of 26 square miles.

Political geography

The State of New Jersey is divided into 21 counties, which contain a total of 566 municipalities. Like many New England states, all land in New Jersey is incorporated. New Jersey municipalities have a strong tradition of independent home rule which, as a result, means that county government is comparatively weaker than in other states and more open to criticisms of waste and ineffectiveness.

Climate

New Jersey has a humid continental climate, vastly affected by its proximity to the Atlantic Ocean.

• Winter is typically cold. The lows usually hover in the 10s and 20s °F (down to -10 °C) and can frequently dip below 0 °F in the northwestern sections of the state. New Jersey winters often feature snowstorms known as Nor'easters that can paralyze the area with over a foot of snow. However, a variation in the climate also occasionally renders winter mild and almost snowless in sections of South Jersey near the Atlantic coastline.

• Springs are mild, averaging in the 50s °F (10 to 15 °C) in late March to the lower 80s °F (25-30 °C) in early June. The weather is unpredictable and brings relatively cool summers as an occasional surprise, and huge snowstorms arriving as late as the second week in April (significant snow after mid-March is fairly rare though). Thunderstorms are common in spring.

• Summers in New Jersey tend to be hot and humid, with temperatures often exceeding 90 °F (32 °C), although high temperatures above 100 °F (38 °C) are about as rare as subzero (F) lows in winter. Humidity levels are usually quite high in July and August. Thunderstorms are common in summer. Hurricanes are considered to be a major threat to the area (and especially the Jersey Shoreline communities in Monmouth, Ocean, Atlantic and Cape May counties). While relatively infrequent compared to areas south and east, a direct hit could cause large loss of life and billions of dollars in damage due to the high population in coastal areas.

• Autumns are comfortable in New Jersey and similar to spring in temperature. However, the weather is notably unpredictable and travelers are advised to check forecasts and bring several layers of clothing in late fall and in the early spring months (e.g., November, March, April) as temperatures do fluctuate quickly at these times of year.

The temperatures vary greatly from the northernmost part of New Jersey to the southernmost part of New Jersey. For example, these are the average high and low temperatures for Cape May, near the state's southernmost ocean-facing point, Sussex, in the mountainous northwest, and Trenton, the state capital located roughly midway between the two:

	Sussex		Trenton		Cape May
	High	Low	High	Low	High	Low
January	34	14	38	24	42	27
February	38	16	41	26	43	28
March	47	25	51	33	51	35
April	59	35	61	42	60	43
May	70	45	71	52	69	53
June	78	54	80	61	78	62
July	83	59	85	67	84	67
August	82	57	83	65	83	66
September	74	49	75	57	77	60
October	63	37	64	45	66	49
November	51	30	54	37	56	40
December	39	21	43	28	47	31
(Temperatures above are Fahrenheit)

Rivers

New Jersey rivers includes streams formally designated as rivers. There are also smaller streams (i.e., branches, creeks, drains, forks, licks, runs, etc.) in the state. Major rivers include the Manasquan, Maurice, Mullica, Passaic, Rahway, Raritan, Musconetcong, and Delaware rivers. Historically, the Delaware and Raritan rivers have provided transportation of goods and people inland from the Atlantic Ocean, and were once connected by the Delaware and Raritan Canal. Today, these rivers, and the streams that feed them, provide sport and recreation for many people.

Physiographic Provinces

New Jersey is a region with a high variety of geographical features in a small area. The area can be broken into five regions, corresponding roughly to geological zones. These regions from north to south are the Appalachian Valley and Ridge, Highlands, Newark Basin Piedmont, Inner Coastal Plain, and the Outer Coastal Plain.

Appalachian Valley and Ridge Physiographic Province

The Appalachian Valley and Ridge lies in the northeastern corner of the valley and includes the Kittatinny Mountains, several smaller valleys and the popular Delaware Water Gap. The state's highest point, the aptly named High Point is within this area, at 1,803 feet. Most of the state's section of the Appalachian Trail runs through this area. The province is bounded on the southeast by an unconformity between Cambrian and Precambrian formations.

Highlands Physiographic Province

The Highlands Physiographic Province is a geological formation composed primarily of Precambrian igneous and metamorphic rock running from the Delaware River near Musconetcong Mountain, northeast through the Skylands Region of New Jersey along the Bearfort Ridge and the Ramapo Mountains. Numerous abandoned mines dot the region, dating from the 18th and 19th centuries when iron, copper, zinc and other minerals were extracted from the formations. The glaciated northern half of the province has an abundance of lakes and reservoirs which serve as water supplies for the urban areas to the east. The region's watershed is protected by the Highlands Water Protection and Planning Act.