Facts we can source about this employer, with the year of every figure.
By AtiveSite · Published 07/11/2026 · Updated 08/11/2026 · Every figure is linked to its source below.
Quest Diagnostics ranks #119 among the 200 largest US-headquartered employers, with about 65,000 employees worldwide (2026). It is headquartered in New Jersey.
| Fact ⇅ | Value ⇅ |
|---|---|
| Rank among the 200 | 119 |
| Headquarters | New Jersey |
| Industry | Health care |
| Employees (global) | 65,000 (2026) |
| Founded | 1967 |
| Website | https://questdiagnostics.com |
Headcount is global, includes workers outside the US and may differ from the company's latest annual report.
Quest Diagnostics ranks 119 of the 200 largest US-headquartered employers in our list, with about 65,000 employees worldwide (2026). That is roughly the number of people who live in Four Corners, Florida. It was founded 1967.
The company's headquarters state, New Jersey, has 9,343,809 residents, a median household income of $103,556 and an unemployment rate of 4.2%. The occupations with the most jobs in the state are Home Health and Personal Care Aides (median $37,090); Cashiers (median $34,590); Laborers and Freight, Stock, and Material Movers, Hand (median $39,540); Fast Food and Counter Workers (median $34,150); Registered Nurses (median $106,500). A large employer headquartered there hires from the same pool, plus specialised roles tied to its industry (Health care).
Honest limits. The headcount is the company's global figure as reported in its public filings and compiled on Wikipedia. It does not say how many people work at the headquarters, and it does not mean the company is hiring. For open positions, use the company's own careers page, linked in the official links below.
These links go to official sources and open in a new window. The first one is the government's or company's own site as listed in Wikidata (property "official website"); check it before relying on it.
The company's home state is New Jersey: median household income $103,556, unemployment 4.2%, state income tax: graduated, top rate 10.75%.
| Company ⇅ | Industry ⇅ | Employees ⇅ |
|---|---|---|
| Cognizant Technology Solutions | Information technology, Consulting, Outsourcing | 349,800 |
| Johnson & Johnson | Pharmaceutical, Medical Technology | 138,200 |
| Burlington Stores | Retail | 83,309 |
| Merck & Co. | Pharmaceuticals | 75,000 |
| Becton, Dickinson and | Medical equipment, Consulting | 72,000 |
| Automatic Data Processing | Business services, Software | 67,000 |
| Prudential Financial | Financial services | 38,196 |
| Company ⇅ | Headquarters ⇅ | Employees ⇅ |
|---|---|---|
| UnitedHealth Group | Minnesota | 390,000 |
| HCA Healthcare | Tennessee | 316,000 |
| CVS Health | Rhode Island | 300,000 |
| CommonSpirit Health | Illinois | 175,000 |
| Thermo Fisher Scientific | Massachusetts | 125,000 |
| Trinity Health | Michigan | 120,000 |
| Abbott Laboratories | Illinois | 115,000 |
| Northwell Health | New York | 105,000 |
| Elevance Health | Indiana | 104,200 |
| Adventist Health System/Sunbelt | Florida | 100,000 |
| Tenet Healthcare | Texas | 98,000 |
| DaVita | Colorado | 78,000 |
About 65,000 worldwide (2026), per the company's reported figure.
New Jersey.
It ranks #119 among the 200 largest US-headquartered employers by global headcount.