Most of the beetles found in New Jersey have a reputation for being harmful pests, either infesting outdoors in fields or gardens or causing damage to property and food indoors. For instance, the emerald ash borer beetle feeds on ash trees, whereas the khapra beetle infects oilseeds and cereal grains.

The Asian longhorn beetle, mainly infesting poplar, willow, or elm trees, is one of the largest beetles in the state, while the carpet beetle species are the smallest. Another unique species, the eastern beach tiger beetle, was spotted along the New Jersey Beaches in the first half of the 1990s and the early 2000s. At present, a small population of this beetle still exists here.

Biggest Beetles: Asian Longhorn Beetle

Smallest Beetles: Black Carpet Beetle, Varied Carpet Beetle, Saw Toothed Grain Beetle

Here is the list of beetles found in New Jersey arranged in order of the family they belong to.