Depends on what county your from, honestly. The counties on the I 95 corridor between Camden and Hudson counties are Dem country.
The South minus Cumberland and mayby Atlantic county is Red, and Atlantic and Cumberland flip flop and turn in weird results sometimes.
The far north is another red stronghold except for Bergen and Passaic county. Bergen is outside of Newark THE Democratic stronghold. Problem is for the Republicans is Bergen county is the most populous county in the state by far, in spite of not having any really big cities in it like a Newark or a Camden, it's a bunch of suburbs for people who can't afford to live in Manhattan.
That said, for all the talk of New York potentially going red, I don't see that happening until NJ flips. If or when that happens then NY is in trouble. But I don't think that's happening this cycle or anytime soon.