551 Area Code 🌍☎️

The most populous cities in area code 551 are: Jersey City, Newark, Hackensack, Ramsey, and Fair Lawn.

Other cities in the 551 area code include: Bayonne, Union City, Ridgewood, Closter, Westwood, Kearny, Wyckoff, Cliffside Park, Park Ridge, Englewood, Oakland, Teaneck, Dumont, Oradell, Mahwah, Weehawken, Leonia, Rutherford, Hasbrouck Heights, and Rochelle Park.

Jersey City is the second-most-populous city in the U.S. state of New Jersey after Newark. It is the seat of Hudson County as well as the county's largest city. As of 2015, the Census Bureau's Population Estimates Program calculated that Jersey City's population was 264,290, with the largest population increase of any municipality in New Jersey since 2010, an increase of about 6.7% from the 2010 United States Census, when the city's population was at 247,597, ranking the city the 75th-largest in the nation. Part of the New York metropolitan area, Jersey City is bounded on the east by the Hudson River and Upper New York Bay and on the west by the Hackensack River and Newark Bay. A port of entry, with 30.7 miles (49.4 km) of waterfront and significant rail connections, the city is an important transportation terminus and distribution and manufacturing center for the Port of New York and New Jersey. Financial and service industries as well as direct rapid transit access to Manhattan in New York City have played a prominent role in the redevelopment of the Jersey City waterfront and the creation of one of the nation's largest downtown central business districts.After a peak population of 316,715 measured in the 1930 Census, the city's population saw a half-century-long decline to a low of 223,532 in the 1980 Census. Since then, the city's population has grown, with the 2010 population reflecting an increase of 7,542 (+3.1%) from the 240,055 counted in the 2000 Census, which had in turn increased by 11,518 (+5.0%) from the 228,537 counted in the 1990 Census.

Newark is the most populous city in the U.S. state of New Jersey and the seat of Essex County. As one of the nation's major air, shipping, and rail hubs, the city had a population of 277,140 in 2010, making it the nation's 67th most-populous municipality, after being ranked 63rd in the nation in 2000. For 2015, the Census Bureau's Population Estimates Program calculated a population of 281,944, an increase of 1.7% from the 2010 enumeration, ranking the city the 70th largest in the nation. Newark is the second largest city in the New York metropolitan area, located approximately 8 miles (13 km) west of lower Manhattan.Settled in 1666 by Puritans from New Haven Colony, Newark is one of the oldest European cities in the United States. Its location at the mouth of the Passaic River (where it flows into Newark Bay), has made the city's waterfront an integral part of the Port of New York and New Jersey. Today, Port Newark-Elizabeth is the primary container shipping terminal of the busiest seaport on the American East Coast. In addition, Newark Liberty International Airport was the first municipal commercial airport in the United States, and today is one of its busiest. Several leading companies have their headquarters in Newark, including Prudential, PSEG, Panasonic Corporation of North America, Audible.com, IDT Corporation, and Manischewitz. A number of important higher education institutions are also located in the city, including the Newark campus of Rutgers University (which includes law and medical schools and the Rutgers Institute of Jazz Studies); the New Jersey Institute of Technology ; and Seton Hall University's law school. The U.S. District Court for the District of New Jersey sits in the city as well. Local cultural venues include the New Jersey Performing Arts Center, Newark Symphony Hall, The Prudential Center and the Newark Museum.Newark is divided into five political wards ; the East, West, South, North and Central wards and contains neighborhoods ranging in character from bustling urban districts to quiet suburban enclaves. Newark's Branch Brook Park is the oldest county park in the United States and is home to the nation's largest collection of cherry blossom trees, numbering over 5,000.

Hackensack is a city in Bergen County, New Jersey, United States, and serves as its county seat. It was officially named New Barbadoes Township until 1921, but it was informally known as Hackensack. As of the 2010 United States Census, the city's population was 43,010, reflecting an increase of 333 (+0.8%) from the 42,677 counted in the 2000 Census, which had, in turn, increased by 5,628 (+15.2%) from the 37,049 counted in the 1990 Census. An inner suburb of New York City, Hackensack is located approximately 12 miles (19 km) northwest of Midtown Manhattan and about 7 miles (11 km) from the George Washington Bridge. From a number of locations, the New York City skyline can be seen. The Metropolitan Campus of Fairleigh Dickinson University borders the Hackensack River in both Hackensack and Teaneck. Hackensack is also the home of the New Jersey Naval Museum and the World War II submarine USS Ling. Astronaut Wally Schirra is perhaps Hackensack's most famous native son.The city is known for a great diversity of neighborhoods and land uses very close to one another. Within its borders are the prominent Hackensack University Medical Center, a trendy high-rise district about a mile long, classic suburban neighborhoods of single-family houses, stately older homes on acre-plus lots, older two-family neighborhoods, large garden apartment complexes, industrial areas, the Bergen County Jail, a tidal river, Hackensack River County Park, Borg's Woods Nature Preserve, various city parks, large office buildings, a major college campus, the Bergen County Court House, a vibrant small-city downtown district, and various small neighborhood business districts. According to a 2016 study, the city ranked as the 5th-best place in New Jersey for entrepreneurs.

The 551 area code lies within the Eastern Daylight Time Zone (or EDT). The current time in Eastern Daylight Time is 07:21 AM on Mar 10, 2026.