Due to the fact that the FHC keeps changing their URLs for the information mentioned below, I've unlinked them.  You can get the census information by visiting their web site and doing a search.

FAMILY HISTORY LIBRARY CATALOG:
First known census of Newark and vicinity 1826
7th ward, city of Newark, census of 1855
New Jersey 1870 Essex County federal census index

I will be moving the census information from my Essex County site to this site shortly, until then, please visit:

Census Record information for Essex County

Census Extraction Forms

PARTIAL NEWARK 1880 FEDERAL CENSUS

1900 Census of "Inmates" of Newark Orphan Asylum

 FHC Roll Numbers for 1910 Census (by Street)
A-E  F-J  K-O  P-T  U-Z  Numbered Streets
By Enumeration Districts and Wards

LDS FHC Film #'s for the 1920 Census

1930 Federal Census Information & release date

FEDERAL and STATE CENSUS INFORMATION
with Lists of Children Residing in Orphanages
Jewish and Other Denominations