How Many Quest Diagnostics are Present in the USA?
Quest Diagnostics is American based clinical laboratory. The total number of the Quest Diagnostics locations in the US are 5,779 and its graphical representation is shown in map.
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Number of Quest Diagnostics in the United States in 2025
According to reports, there are 5,779 Quest Diagnostics locations in 52 states and territories of the United States. The highest number of locations of US are in Texas and Houston with 700 stores and 77 stores, respectively. Texas makes up approximately 12% of all Quest Diagnostics locations in the United States.
Data updated on May 28, 2026
5,779
STORE LOCATIONS
52
STATES & TERRITORIES
2,456
CITIES
Top 10 States & Territories With the Highest Number of Quest Diagnostics
Explore the top 10 U.S. states and territories with the highest number of Quest Diagnostics locations. Highlighted below are the top 3 states and territories where Quest Diagnostics has the strongest presence along with a detailed breakdown of store counts and population data for each state.
700 (12%)
Texas
In Texas, there is for every 41,423 people, accounting for approximately 12% of all Quest Diagnostics locations.
644 (11%)
California
In California, there is for every 61,354 people, accounting for approximately 11% of all Quest Diagnostics locations.
471 (8%)
Florida
In Florida, there is for every 45,601 people, accounting for approximately 8% of all Quest Diagnostics locations.
| State & Territory | Number of Locations | Population | Population Per Locations |
|---|---|---|---|
| Texas | 700 (12%) | 29.00M | 41.42K |
| California | 644 (11%) | 39.51M | 61.35K |
| Florida | 471 (8%) | 21.48M | 45.60K |
| New York | 385 (7%) | 19.45M | 50.53K |
| Ohio | 247 (4%) | 11.69M | 47.32K |
| Pennsylvania | 231(4%) | 12.80M | 55.42K |
| Georgia | 220 (4%) | 10.62M | 48.26K |
| New jersey | 197 (3%) | 8.88M | 45.09K |
| Tennessee | 191 (3%) | 6.83M | 35.75K |
| Illinois | 178 (3%) | 12.67M | 71.19K |
Quest Diagnostics operates in 54 States and Territories across the United States.
Which States and Territories Don't Have Quest Diagnostics?
Find out the 4 States & Territories across the US that are don’t yet have Quest Diagnostics locations. The list of regions where the popular brand has yet to establish its presence are:
- American Samoa
- Guam
- U.S. Virgin Islands
- Northern Mariana Islands
Top Cities With the Most Quest Diagnostics Outlets in the United States
Discover the top 10 cities across the US with highest Quest Diagnostics outlet locations. The detailed breakdown provides a clear view of Quest Diagnostics location distribution among the states & territories and number of locations in the USA.
| City | State & Territory | Number of Store |
|---|---|---|
| Houston | Texas | 77 |
| New York | New York | 54 |
| San Antonio | Texas | 48 |
| Brooklyn | New York | 44 |
| Jacksonville | Florida | 32 |
| Austin | Texas | 31 |
| Las Vegas | Nevada | 28 |
| Bronx | New York | 28 |
| Indianapolis | Indiana | 27 |
| Dallas | Texas | 27 |
Get A List of Quest Diagnostics Locations of the USA
Get the complete Quest Diagnostics locations datasets for the USA! Download in any format you need, including JSON, Esri Shapefile, GeoJSON, KML (Google Earth), or even a custom format. This enriched POI dataset includes geo-coded addresses, phone numbers, opening hours, and more.
Download the Complete Datasets of Quest Diagnostics Locations Across the USA
You can download the complete list of Quest Diagnostics locations used in this analysis from our data store. Here’s a sample of 10 records for you to review the fields and data that we provide.
| Store ID | Brand/Store Name | Category | Store URL | Phone No. | Address | Latitude | Longitude | Direction URL | Store Status |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Quest Diagnostics | Health Care, Personal Care | https://www.questdiagnostics.com/ | 1 (800) 222-0446 | 500 Plaza Drive | 40.78825486 | -74.04468953 | Open | |
| 2 | Quest Diagnostics | Health Care, Personal Care | https://www.questdiagnostics.com/ | 1 (866) 697-8378 | 10101 Renner Boulevard | 38.94666502 | -94.77628909 | Open | |
| 3 | Quest Diagnostics | Health Care, Personal Care | https://www.questdiagnostics.com/ | 1 (800) 209-9816 | 33608 Ortega Highway | 33.56205134 | -117.5438763 | Open | |
| 4 | Quest Diagnostics | Health Care, Personal Care | https://www.questdiagnostics.com/ | 1 (847) 885-2010 | 506 East State Parkway | 42.05654035 | -88.06691759 | Open | |
| 5 | Quest Diagnostics | Health Care, Personal Care | https://www.questdiagnostics.com/ | 866) 697-8378 | 50 Republic Road | 40.75838182 | -73.41436149 | Open |