| Official Name: | Troy Hills, New Jersey |
| Settlement Type: | Census-designated place |
| Pushpin Map: | USA New Jersey Morris County#USA New Jersey#USA |
| Pushpin Label: | Troy Hills |
| Pushpin Map Caption: | Location in Morris County##Location in New Jersey##Location in the United States |
| Pushpin Relief: | yes |
| Coordinates: | 40.8525°N -74.3922°W |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Morris |
| Subdivision Type3: | Township |
| Subdivision Name3: | Parsippany–Troy Hills |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Sq Mi: | 2.92 |
| Area Land Sq Mi: | 2.88 |
| Area Water Sq Mi: | 0.04 |
| Area Total Km2: | 7.55 |
| Area Land Km2: | 7.45 |
| Area Water Km2: | 0.10 |
| Population As Of: | 2020 |
| Population Total: | 5081 |
| Population Density Sq Mi: | 1765.46 |
| Population Density Km2: | 681.58 |
| Timezone: | Eastern (EST) |
| Utc Offset: | −05:00 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | −04:00 |
| Elevation Ft: | 225 |
| Postal Code Type: | ZIP Code |
| Postal Code: | 07054 (Parsippany) |
| Area Code: | 973/862 |
| Blank Name: | FIPS code |
| Blank Info: | [2] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2806209 |
Troy Hills is a census-designated place (CDP)[3] in the township of Parsippany–Troy Hills, Morris County, New Jersey, United States. As of the 2020 census, it had a population of 5,081.
Troy Hills is in eastern Morris County, in the southeast part of Parsippany–Troy Hills Township. It is bordered to the north and west by the Parsippany CDP, to the south by Whippany in Hanover Township, and to the east by Troy Meadows, the largest freshwater marsh in New Jersey.
Interstate 80 forms the northern edge of the CDP, and Jefferson Road is the western edge. Troy Hills is 6miles northeast of Morristown and northwest of Newark.
According to the U.S. Census Bureau, the Troy Hills CDP has a total area of 2.92sqmi, of which 2.88sqmi are land and 0.04sqmi, or 1.27%, are water.[1] The community is drained by Troy Brook, which flows east into Troy Meadows and is a tributary of the Whippany River, part of the Passaic River watershed.
Troy Hills was first listed as a CDP prior to the 2020 census.