The geographic location of where a fossil was found is consider to be one of the most important factors in determining it's age. The geological time period for most collecting sites in New Jersey is well documented (Atlantic Costal Plain - USGS). As an aid to identification, I've divided this section into two time periods, Cretaceous and Tertiary.

CRETACEOUS

Scapanorhynchus texanus are the largest and most frequently encounter Cretaceous  shark teeth in New Jersey.
	Goblin Scapanorhynchus texanus
	Abundant
Common Crow Squalicorax sp.	Crow Squalicorax bassanii	Crow Pseudocorax affinis
Very Common	Uncommon	Scarce
Extinct Mackerel  Archaeolamna kopingensis	Extinct Mackerel Cretolamna appendiculata	Extinct Mackerel  Protolamna borodini
Very Common	Common	Micro

Hybodont Meristodonoides sp.	Angle Shark Squatina hassei	Hybodont Lonchidion babulskii
Uncommon	Micro	Micro
Nurse Shark Cantioscyllium decipiens	Bamboo Shark Chiloscyllium greeni	Extinct Thresher Paranomotodon angustidens
Micro	Micro	Common

Sand Tiger Carcharias samhammeri	Sand Tiger Eostriatolamia holmdelensis	Sand Tiger Odontaspis aculeatus
Uncommon	Uncommon	Very uncommon
Catshark Scyliorhinus sp.	Bullhead Shark Heterodontus sp.	Bullhead Shark Heterodontus sp.
Micro	Micro	Micro

Lemon Shark Negaprion eurybathrodon	Gray Carcharhinus sp.	Extinct Tiger Shark Galeocerdo aduncus
Abundant	Uncommon	Common

Extinct Tiger Galeocerdo latidens	Eocene Tiger Galeocerdo eaglesomei	Longtooth Tiger Physogaleus contortus
Very Uncommon	Uncommon	Very Common
Requiem shark Physogaleus secundus	Extinct Houndshark Pachygaleus lefevrei	Tope shark Galeorhinus ypresiensis
Common	Micro	Micro

Extinct Shortfin Mako Isurus desori	Extinct Early Mako Isurus praecursor	Longfin mako Isurus retroflexus
Uncommon	Uncommon	Very Uncommon

Cow Notorynchus sp.	Ric Carcharocles auriculatus	Chub Carcharocles chubutensis
Uncommon	Uncommon	Uncommon
Smooth Hammerhead Sphyrna laevissima	Common Thresher Alopias latidens	Bigeye Thresher Alopias superciliosus
Uncommon	Uncommon	Very Uncommon

Sand Tiger Odontaspis reticulata	Sand Tiger Striatolamia macrota	Sand Tiger Carcharias cuspidata
Abundant	Common	Abundant
Sand Tiger Jaeckelotodus trigonalis	Sand Tiger Hypotodus verticalis	Extinct Goblin Anomotodon novus
Uncommon	ID questionable - under review	Uncommon
False Mako Parotodus benedeni	Snaggletooth Hemipristis serra	Extinct Mackerel Shark Xiphodolamia ensis
Scarce	Common	Uncommon
	Extinct Requiem Shark Abdounia recticona
	Micro

Across the K/T Boundary

In some cases a genus or species may be present in both the Cretaceous and  Tertiary and I've combined the page.

 

Catshark Scyliorhinus sp.	Extinct Mackerel Cretolamna appendiculata	Angle Shark Squatina sp.
Micro	Uncommon	Micro
Bullhead Shark Heterodontus sp.	Bullhead Shark Heterodontus sp.
Micro	Micro

Vertebrae Coprolites	Pathological	Shark  Cartilage
Common	Uncommon	Uncommon