New Jersey English
Despite popular stereotypes in the media that there is a singular New Jersey accent, there are in fact several distinct accents native to the U.S. state of New Jersey, none being confined only to New Jersey. Therefore, the term New Jersey English is diverse in meaning and often misleading, and it may refer to any of the following dialects of American English (most frequently New York City English and Philadelphia English) or even to intermediate varieties that blend the features of these multiple dialects. African-American dialect
Working- and middle-class African Americans throughout New Jersey commonly speak African-American Vernacular English (AAVE), regardless of the area of the state in which they were raised. New Jersey AAVE commonly includes a distinction between the vowels of cot and caught as well as notable fronting of the  vowel. New York metropolitan dialect

The dialect of greater New York City is spoken in northeastern New Jersey plus Monmouth County. Therefore, the short-a system of these areas of New Jersey is most similar to the New York City split-a system, albeit with some variation. East of the Hackensack River and in Newark, William Labov finds the split-a system to occur with no more variation than in New York City proper. However, west of the Hackensack River, he finds that the normal function word constraint of New York City English is lost, and the open syllable constraint becomes variable. Furthermore, most of the New York metropolitan dialect heard in New Jersey is rhotic, or "r-pronouncing", although the speech of Newark as well as Jersey City (just across the Hudson River from New York City) may, by contrast, be non-rhotic, or "r-dropping". Northern dialect

Outside of the New York and Philadelphia metropolitan areas, regional English of North Jersey was classified as part of the broad Northern U.S. phonological region by The Atlas of North American English (ANAE) in 2006 and part of the Hudson Valley lexical region by Hans Kurath in 1949. According to the ANAE, the  vowel remains very far back in the mouth. Like Inland Northern English but unlike New York City English, the accent backs  and fronts  so that both vowels are centralized, distinguished from each other only by height. However, unlike the Inland Northern accent, this accent uses the nasal short-a system. Philadelphia metropolitan dialect

The regional dialect of the Mid-Atlantic States, in this case Philadelphia English specifically, is spoken in South Jersey and some parts of Central Jersey, including most of Ocean County. Generally, the closer a speaker is raised to the city of Philadelphia, the more features their idiolect will share with the Philadelphia sub-dialect, such as the use of the term hoagie to refer to a submarine sandwich (or sub). In Vineland in South Jersey and in some areas of Central Jersey, a nasal short-a system has been reported (in which  is tensed only before a nasal consonant) rather than the defining Philadelphia split-a system otherwise typical of South Jersey. References

Bibliography

Further reading
"Where do N.J.'s different accents actually come from? A linguist weighs in" by Kelly Roncace, NJ.com, May 20, 2017

External links
Category:New Jersey English, Wiktionary

American English
English