| Official Name: | Watsessing, New Jersey |
| Settlement Type: | Census-designated place |
| Pushpin Map: | USA New Jersey Essex County#USA New Jersey#USA |
| Pushpin Label: | Watsessing |
| Pushpin Map Caption: | Location in Essex County##Location in New Jersey##Location in the United States |
| Pushpin Relief: | yes |
| Coordinates: | 40.7878°N -74.2008°W |
| Subdivision Type: | Country |
| Subdivision Name: |  United States |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Essex |
| Subdivision Type3: | Township |
| Subdivision Name3: | Bloomfield |
| Area Footnotes: | [1] |
| Area Total Sq Mi: | 0.63 |
| Area Land Sq Mi: | 0.62 |
| Area Water Sq Mi: | 0.01 |
| Area Total Km2: | 1.62 |
| Area Land Km2: | 1.60 |
| Area Water Km2: | 0.02 |
| Population As Of: | 2020 |
| Population Density Km2: | 5041.06 |
| Timezone: | Eastern (EST) |
| Utc Offset: | −05:00 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | −04:00 |
| Elevation Ft: | 116 |
| Postal Code Type: | ZIP Code |
| Postal Code: | 07003 (Bloomfield) |
| Area Code: | 862/973 |
| Blank Name: | FIPS code |
| Blank Info: | [2] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2806217 |
| Population Total: | 8078 |
| Unit Pref: | Imperial |
| Population Density Sq Mi: | 13050.08 |
Watsessing is a neighborhood and census-designated place (CDP)[3] located in Bloomfield Township, Essex County, in the U.S. state of New Jersey. It is in the southwest corner of the township, bordered to the northwest by Glen Ridge, to the southwest by East Orange, to the southeast by the Ampere North part of Bloomfield, and to the northeast by the rest of Bloomfield. Watsessing Park is in the center of the community, in the valley of the Second River or Watsessing River, part of the Passaic River watershed.
The Garden State Parkway runs through the center of the community, on the southeast side of Watsessing Park, with access from Exit 148. The parkway leads north 5miles to Clifton and south through East Orange 5miles to Irvington. The NJ Transit Montclair-Boonton Line has two stops in the community: Watsessing Avenue in the southeast and Bloomfield in the northeast.
Watsessing was first listed as a CDP prior to the 2020 census.