List of Laboratories in the USA

Last updated 21 October 2026

There are 125,256 laboratories in the USA, one in every 510 US companies. Most of them are small: nine in ten have one to four people, and only 1,438 firms employ 50 people or more. One in sixteen laboratories is based in Houston, Miami, Austin, New York and Brooklyn. Below you find the largest laboratories in the USA, the cities where they cluster, how many started this year and which are the oldest. The full list with addresses, phone numbers and email is in our US company database or through the Company Data API.

125,256 companies indexed · Data counted on 21 October 2026

Companies125,2561 in510 US companiesCities7,572Largest cityHouston 1,986Sole traders2%Employees1-4 (86%)Revenue$100-500K (50%)Email15%Phone41%Website28%

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A live view of all 125,256 laboratories, sorted by revenue. Narrow it by region, city, employee size, revenue, legal form or founding year, or search a firm by name.

Labcorp Holdings INC.Labcorp Holdings INC.

	Company Name	Country	City	Address 1	State/Province	Postal Code	Website	Founding Year	Yearly Revenue in U.S. Dollars	Employees Total	Business Legal Type - Description	Number of Companies in Group	Company Registration Number
1	Labcorp Holdings INC.	USA	Burlington	358 S Main St	Alamance	27215-5837	labcorp.*****	1971	$13,951,700,000	71,000	Corporation	2592	2721624
2	Laboratory CORPORATION Of America Holdings	USA	Burlington	531 S Spring St	Alamance	27215	labcorp.*****	1994	$12,161,600,000	67,000	Corporation	2592	2384108
3	Quest Diagnostics Incorporated	USA	Secaucus	500 Plaza Dr Ste G	Hudson	07094	questforhealthsystems.*****	1967	$11,035,000,000	57,000	Corporation	5018	D00284919
4	Exact Sciences CORPORATION	USA	Madison	5505 Endeavor Ln	Dane	53719-8803	exactsciences.*****	1995	$3,246,990,000	7,000	Corporation	1313	2479901
5	Ul Solutions INC.	USA	Northbrook	333 Pfingsten Rd	Cook	60062-2002	ul.*****	1894	$3,053,000,000	14,851	Corporation	255	4570442
6	Natera, INC.	USA	Austin	13011 Mccallen Pass Bldg A	Travis	78753-5381	natera.*****	2003	$2,306,113,000	6,140	Corporation	6	4292589
7	Radnet, INC.	USA	Los Angeles	1510 Cotner Ave	Los Angeles	90025-3303	radnet.*****	1985	$2,040,210,000	9,276	Corporation	310	4528434
8	ST. Joseph's-Baptist Health Care	USA	Tampa	3001 W Dr Martin Luther King Jr Blvd	Hillsborough	33607-6307	baycare.*****	1983	$1,992,226,252	250	Corporation	151	590774199
9	American Oncology Network, INC.	USA	Fort Myers	14543 Global Pkwy Ste 110	Lee	33913-9446	panaceaoncology.*****	2017	$1,759,484,000	1,914	Corporation	15	4169790
10	Sotera Health Company	USA	Broadview Heights	9100 S Hills Blvd Ste 300	Cuyahoga	44147-3525	soterahealth.*****	2015	$1,163,617,000	3,000	Corporation	130	5712398
11	Central Iowa Hospital CORPORATION	USA	Des Moines	1200 Pleasant St	Polk	50309-1406	unitypoint.*****	2020	$1,149,177,894	1,000	Corporation	N/A	N/A
12	Pas Parent LLC	USA	Saint Paul	2665 Long Lake Rd Ste 300	Ramsey	55113-1154	N/A	2016	$1,149,052,116	6,566	Corporation	125	6118570
13	Guardant Health, INC.	USA	Palo Alto	3100 Hanover St	Santa Clara	94304-1119	guardanthealth.*****	2011	$982,021,000	2,490	Corporation	7	5077537
14	Caris Life Sciences, INC.	USA	Irving	750 W John Carpenter Fwy Ste 800	Dallas	75039-2520	carislifesciences.*****	2008	$812,033,000	1,846	Corporation	8	0803691720
15	Northwell Health Laboratories	USA	New Hyde Park	450 Lakeville Rd Ste M50	Nassau	11042-1117	worldcourier.*****	1997	$743,529,825	99	Corporation	N/A	2203823
16	Neogenomics, INC.	USA	Fort Myers	9490 Neogenomics Way	Lee	33912-4553	neogenomics.*****	2001	$727,332,000	2,500	Corporation	27	C25286-1998
17	Lifenet Health	USA	Virginia Beach	1864 Concert Dr	Virginia Beach	23453-1903	lifenethealth.*****	1982	$598,564,898	500	Corporation	18	02356830
18	Veracyte, INC.	USA	South San Francisco	6000 Shoreline Ct Ste 300	San Mateo	94080-7606	veracyte.*****	2006	$517,145,000	755	Corporation	9	20141174042
19	Invitae CORPORATION	USA	San Francisco	1400 16th St	San Francisco	94103-5110	invitae.*****	2024	$516,303,000	1,700	Corporation	14	4741049
20	The Oncology Institute INC	USA	Cerritos	18000 Studebaker Rd Ste 800	Los Angeles	90703-2671	theoncologyinstitute.*****	2019	$502,729,000	641	Corporation	8	7682314
21	Clinical Pathology Laboratories, INC.	USA	Austin	9200 Wall St	Travis	78754-4534	cpllabs.*****	1990	$484,292,597	1,500	Corporation	831	0113784700
22	Sgs North America INC.	USA	Bloomfield	400 Broadacres Dr Ste 200 Fl 2	Essex	07003	sgs.*****	1980	$482,014,388	3,350	Corporation	181	0888911
23	Testamerica Environmental Services, LLC	USA	North Canton	4101 Shuffel St Nw	Stark	44720-6900	testamericainc.*****	2018	$476,327,325	2,531	Corporation	2097	3600786
24	Grifols Diagnostic Solutions INC.	USA	Los Angeles	2410 Grifols Way	Los Angeles	90032-3514	grifols.*****	2013	$476,090,014	1,591	Corporation	490	5414711
25	Testamerica Holdings, INC.	USA	North Canton	4101 Shuffel St Nw Ste 100	Stark	44720-6900	testamericainc.*****	2006	$470,401,578	2,531	Corporation	2097	4220321

Showing 25 of 125,172 companies

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Laboratories in Houston

Houston has 1,986 laboratories, 0.2% of all 881,247 Houston companies and 15% above the national share. Four in five Houston firms have fewer than five people; 36 have 50 or more. 209 new firms were entered in 2026, 41 date from before 1990.

Size

1-4 staff: 1,633 · 83%
5-9: 193 · 10%
10-19: 69 · 3%
20-49: 43 · 2%
50+: 36 · 2%

Legal form

Sole traders: 162 · 8%
Partnerships: 39 · 2%
Corporations and LLCs: 1,410 · 71%
Other or none: 375 · 19%

Of the US total: 1.6%
Of all Houston companies: 0.2%
Against the national share: 1.1×

New

Entered 2026 so far: 209
Entered 2025: 286
Of USA's 2026 entries: 1.3%

Old

Before 1990: 41 · 2%
1990 or later: 1,945 · 98%
Of USA's pre-1990 firms: 1.4%

Reachable

Email: 290 · 15%
Phone: 836 · 42%
Website: 576 · 29%

Revenue (USD)

Under $100K: 657 · 36%
$100K-$500K: 863 · 48%
$500K-$1M: 138 · 8%
$1M and more: 144 · 8%

Largest

19,333
21,479
31,000
4750
5632

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Largest laboratories in the USA

The biggest firms by staff and by revenue, the largest in Houston, the biggest newcomers of 2026 and the oldest firms. Click a name for the record.

Labcorp Holdings is the largest laboratory in the USA by headcount. 1,438 firms employ 50 people or more; 677 employ 100 or more.

1Burlington71,000 staff
2Secaucus57,000 staff
3Egg Harbor Township5,000 staff
4San Antonio4,950 staff
5White Plains4,413 staff
6Princeton4,400 staff
7Livermore4,167 staff
8Salt Lake City3,000 staff
9Broadview Heights2,900 staff
10Irvine2,450 staff

By employee size · 124,232 firms with a known headcount

Employees	Firms	%
1-4	107,018	86%
5-9	9,428	8%
10-19	3,939	3%
20-49	2,409	2%
50-99	761	0.6%
100-199	335	0.3%
200-499	212	0.2%
500-999	83	<0.1%
1,000+	47	<0.1%

86% have 1 to 4 people; 2,409 have 20 to 49; 1,438 have 50 or more.

By yearly revenue (USD)

Revenue	Firms	%
< $100K	42,456	38%
$100K-$500K	55,603	50%
$500K-$1M	5,686	5%
$1M-$5M	6,302	6%
$5M-$10M	383	0.3%
$10M-$50M	336	0.3%
$50M-$100M	47	<0.1%
$100M-$500M	48	<0.1%
$500M+	20	<0.1%

50% between $100,000 and $500,000; 6,302 between $1M and $5M; 834 above $5M.

How many laboratories are there in the USA?

Laboratories in the USA

125,256

21 October 2026

There are 125,256 laboratories in the USA in our data (21 October 2026). That is one in every 510 US companies. About 78 new firms are entered in the register every working day this year (16,406 so far in 2026).

Structure

Single-site firms: 109,576 87%
Head offices: 2,166
Branch offices: 13,514

Classification

Our platform filter is SIC 8071, 8734.

93,891 of the 125,256 are corporations and LLCs (75%); 2,761 are sole traders. They come from the state business registers and our US register data, through the Company Data API.

Firm sizes in the USA

Of the 124,232 US laboratories with a known headcount, 107,018 (86%) have one to four people, 9,428 have five to nine, 6,348 have ten to 49 and 1,438 have 50 or more. Most firms turn over between $100,000 and $500,000 a year (55,603, 50%).

EU size bands · the grey line shows all US companies

Micro under 10116,446 94%
Small 10 to 496,348 5%
Medium 50 to 2491,308 1%
Large 250+130 0.1%

Grey line: the share among all US companies (96% have under ten staff).

834

firms turn over more than $5 million a year; 451 more than $10 million.

16,406

firms were entered in 2026.

Where in the USA?

Houston has the most laboratories in the USA (1,986), ahead of Miami (1,714), Austin (1,673), New York (1,423) and Brooklyn (1,173). Together the five hold one in sixteen of them. Relative to their size, Casper, Cheyenne and Sacramento have the most: 2.1 to 2.3 times the national share.

Cities by number of firms

7,572 US cities have at least one laboratory; 2,004 have ten or more; 2,287 have exactly one. Click a city to set the lens.

Only here

Where they cluster

Laboratories per 100 companies, in cities with at least 100 of them. The national share is 0.20. Casper has 2.3 times the national share.

2.3×
2.1×
2.1×
2.0×
2.0×
2.0×
1.9×
1.9×
1.8×
1.5×
1.5×
1.4×
1.4×
1.4×

Dashed line: the national share. A filled dot is twice the national share or more.

By county 1,616 counties

County	Firms	%
Los Angeles	4,590	4%
Orange	2,906	2%
Miami-Dade	2,838	2%
Maricopa	2,682	2%
Harris	2,535	2%
Travis	1,774	1%
Cook	1,735	1%
Dallas	1,575	1%
Broward	1,465	1%
New York	1,424	1%

Show all 1,616

Newcomers in the USA in 2026

16,406 laboratories were entered in the US register so far in 2026, about 78 a working day, after 16,324 in 2025. The USA as a whole saw 2,970,531 new companies in 2026, so this industry takes 0.6% of the inflow.

6,3252022
7,8472023
9,4262024
16,3242025
16,4062026 so far

16,385 of this year's 16,406 are corporations and LLCs.

The biggest newcomers of 2026

The year is the register entry; an established firm that changes legal form appears as new.

1Bothell86 staff
2Austin60 staff
3Los Angeles57 staff
4Folsom55 staff
5West Springfield45 staff

How they compare

Next to related industries

There are 128 laboratories for every one of the dental supplies stores in the USA.

Industry	Firms	Website	1-4 staff
Laboratories	125,256	28%	85%
Hospitals	55,284	69%	43%
Dental Laboratories	14,916	41%	83%
Blood Banks	2,464	98%	62%
Contact Lenses Companies	1,622	56%	65%
Dental Supplies Stores	975	80%	57%

In other countries

The USA has more laboratories than Slovakia or Canada.

Country	Firms	Per 1,000 cos.
The USA	125,256	2.0
Slovakia	10,503	8.8
Canada	9,089	2.1
The UK	8,941	1.0
Mexico	6,274	3.5

More countries →

Free sample: laboratories in North America

The oldest firms in the USA

Our data holds 5 US laboratories from before 1900, 82 from before 1950 and 2,903 from before 1990.

1828
1. Plano
1891
1. Chattanooga
1894
1. Northbrook
1898
1. Hanford
1899
1. Teaneck

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1990

2,903

US laboratories date from before 1990

242

were entered in 1990

Sole traders or corporations: how they are organised

One in forty-five US laboratories work as sole traders, against 5% of all US companies. Three in four are corporations and LLCs.

Sole traders2,7612%
Partnerships1,0350.8%
Corporations and LLCs93,89175%
No form on record or other27,56922%

Single-site: 87%
Head offices: 2,166
Branches: 13,514

All US companies: 5% sole traders, 1% partnerships, 68% corporations and LLCs.

How reachable are they?

Laboratories are easier to reach than the average US company: 41% list a phone number and 28% a website.

Email18,331 15%
Phone51,445 41%
Website34,929 28%

Grey line: all US companies (email 15%, phone 42%, website 24%).

The full list with these fields is in our US company database.

Frequently asked questions

How many laboratories are there in the USA?

There are 125,256 laboratories in the USA in our data, counted on 21 October 2026. That is one in every 510 US companies.

Which is the largest laboratory in the USA?

Labcorp Holdings in Burlington, with 71,000 staff.

Which US city has the most laboratories?

Houston, with 1,986, ahead of Miami (1,714), Austin (1,673), New York (1,423) and Brooklyn (1,173). Relative to its size, Casper has the most: 2.3 times the national share.

How many laboratories are there in Houston?

1,986, which is 0.2% of all 881,247 Houston companies and 15% above the national share.

How big is a typical laboratory?

Small. 86% of the 124,232 firms with a known headcount have one to four people; 1,438 have 50 or more. Most turn over between $100,000 and $500,000 a year.

Are US laboratories sole traders or companies?

One in forty-five (2,761) are sole traders, 0.8% are partnerships and 75% (93,891) are corporations and LLCs.

How many laboratories started in 2026?

16,406 were entered in the US register so far in 2026, after 16,324 in 2025. 16,385 of them are corporations and LLCs.

What is the oldest laboratory in the USA?

Bureau Veritas North America in Plano, 1828, followed by Erlanger Clinical Laboratory in Chattanooga (1891) and Ul Solutions in Northbrook (1894). 5 firms date from before 1900.

Which industry code covers laboratories?

Our platform filters them on SIC 8071 (medical laboratories) and 8734 (testing laboratories).

Can I download the full list?

Yes. All 125,256 firms with address, phone, email, legal form, employees, revenue and founding year, as Excel, CSV or through the API.

Discover more: related industries, by city, in other countries

The lists closest to this one. Every industry and city in the USA is on the USA page.

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