List of Security Companies in the USA

Last updated 21 October 2026

There are 77,446 security companies in the USA, one in every 825 US companies. Most of them are small: four in five have one to four people, and only 1,943 firms employ 50 people or more. One in eighteen security firms is based in Houston, Miami, Phoenix, New York and Los Angeles. Below you find the largest security firms 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.

77,446 companies indexed · Data counted on 21 October 2026

Companies77,4461 in825 US companiesCities7,100Largest cityHouston 1,132Sole traders8%Employees1-4 (84%)Revenue< $100K (67%)Email16%Phone54%Website28%

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A live view of all 77,446 security firms, sorted by revenue. Narrow it by region, city, employee size, revenue, legal form or founding year, or search a firm by name.

Securitas Holdings, INC.Securitas 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	Securitas Holdings, INC.	USA	Parsippany	9 Campus Dr	Morris	07054-4499	*****.com	1989	$1,688,202,934	250,000	Corporation	1956	N/A
2	Securitas Services, INC.	USA	Parsippany	9 Campus Dr	Morris	07054-4499	*****.com	2003	$1,613,596,458	130,000	Corporation	1956	3633493
3	Southwestern Teamsters Security Fund	USA	Phoenix	2400 W Dunlap Ave Ste 250	Maricopa	85021-2811	N/A	2009	$1,286,313,579	4	Proprietorship	N/A	866052021
4	Constellis Holdings, LLC	USA	Herndon	13530 Dulles Technology Dr Ste 500	Fairfax County	20171-4642	*****.com	2016	$1,230,000,000	15,000	Corporation	56	4879156
5	Universal Services Of America, LP	USA	Irvine	450 Exchange	Orange	92602-5002	*****.com	2016	$1,215,770,679	150,089	Partnership of unknown type	363	N/A
6	Allied Security Holdings LLC	USA	Conshohocken	161 Washington St Ste 600	Montgomery	19428-2083	*****.com	2004	$946,477,390	53,760	Corporation	217	3817944
7	Brink's, Incorporated	USA	Richmond	1801 Bayberry Ct Ste 400	Richmond City	23226-3771	*****.com	1960	$836,959,958	45,000	Corporation	810	0548002
8	The Adt Security CORPORATION	USA	Boca Raton	1501 W Yamato Rd	Palm Beach	33431-4438	*****.com	2012	$729,473,209	17,100	Corporation	386	660781524
9	Inter-Con Security Systems, INC.	USA	Pasadena	210 S de Lacey Ave	Los Angeles	91105-2048	*****.com	1973	$636,023,452	25,000	Corporation	51	953020192
10	Allied Universal Manager LLC	USA	Conshohocken	161 Washington St Ste 600	Montgomery	19428-2083	*****.com	2016	$596,889,175	250,010	Corporation	198	6037353
11	Securitas Security Services USA, INC.	USA	Parsippany	9 Campus Dr	Morris	07054-4499	*****.com	2002	$536,476,519	100,000	Corporation	1956	3500796
12	Alliedbarton Security Services LLC	USA	Conshohocken	161 Washington St Ste 600	Montgomery	19428-2083	*****.com	2016	$474,181,682	2,010	Corporation	198	3889430
13	Universal Protection Service, LP	USA	Irvine	450 Exchange	Orange	92602	*****.com	2009	$471,368,968	10,730	Partnership of unknown type	363	330973846
14	Gardaworld Cash Services, INC.	USA	Boca Raton	2000 Nw Corporate Blvd	Palm Beach	33431	*****.com	2019	$437,236,315	3,000	Corporation	353	3217691
15	Northern California General Teamsters Security Fund	USA	Stockton	1234 W Oak St	San Joaquin	95203-2606	N/A	2010	$423,808,401	5		N/A	946073033
16	Prosegur Services Group, INC.	USA	Deerfield Beach	598 Hillsboro Technology Dr Bldg F	Broward	33441-7732	*****.us	1980	$373,073,841	4,900	Corporation	34	626719
17	Prosegur Security USA, INC.	USA	Deerfield Beach	598 Hillsboro Technology Dr Ste F	Broward	33441-7732	*****.us	2020	$373,073,841	4,907	Corporation	34	3353028
18	Signal 88, LLC	USA	Omaha	3880 S 149th St Ste 102	Douglas	68144-5568	*****.com	2014	$350,842,781	1,000	Corporation	2	X001219374
19	Soc LLC	USA	Reston	11911 Freedom Dr Ste 900	Fairfax County	20190-5631	*****.com	2015	$350,000,000	1,200	Corporation	152	4456495
20	Security Service	USA	San Antonio	4810 W Military Dr	Bexar	78242-1415	N/A	2015	$343,790,033	4		N/A	N/A
21	Sunstates Security, LLC	USA	Raleigh	801 Corporate Center Dr Ste 300	Wake	27607-5243	*****.com	1999	$315,000,000	6,200	Corporation	11	2012081700100
22	Guardsmark, LLC	USA	Santa Ana	1551 N Tustin Ave Ste 650	Orange	92705-8664	*****.com	2015	$195,147,767	3,500	Corporation	363	0860835
23	Dunbar Armored, INC.	USA	Hunt Valley	50 Schilling Rd	Baltimore County	21031-1418	*****.com	2018	$158,754,435	4,075	Corporation	810	D00099861
24	Contemporary Services CORPORATION	USA	Northridge South	17101 Superior St	Los Angeles	91325-1961	*****.com	1972	$154,550,298	5,000	Corporation	34	952832166
25	Metropolitan Security Services, INC.	USA	Chattanooga	100 E 10th St Ste 400	Hamilton	37402-4218	*****.com	1990	$133,239,527	2,500	Corporation	10	621448519

Showing 25 of 77,446 companies

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Where in the USA?

Houston has the most security companies in the USA (1,132), ahead of Miami (1,102), Phoenix (741), New York (712) and Los Angeles (656). Together the five hold one in eighteen of them. Relative to their size, Naples, Fort Myers and Staten Island have the most: 2.2 to 3.8 times the national share.

Cities by number of firms

7,100 US cities have at least one security firm; 1,483 have ten or more; 2,396 have exactly one. Click a city to set the lens.

Only here

Where they cluster

Security firms per 100 companies, in cities with at least 100 of them. The national share is 0.12. Naples has 3.8 times the national share.

3.8×
2.8×
2.2×
1.8×
1.7×
1.6×
1.6×
1.6×
1.5×
1.4×
1.4×
1.4×
1.4×
1.4×

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

By county 1,525 counties

County	Firms	%
Los Angeles	3,171	4%
Maricopa	1,965	3%
Orange	1,892	2%
Miami-Dade	1,760	2%
Harris	1,423	2%
Broward	1,190	2%
Palm Beach	1,006	1%
Cook	908	1%
Jefferson	896	1%
Dallas	882	1%

Show all 1,525

Security firms in Houston

Houston has 1,132 security companies and security firms, 0.1% of all 881,247 Houston companies and 6% above the national share. Four in five Houston firms have fewer than five people; 35 have 50 or more. 35 new firms were entered in 2026, 26 date from before 1990.

Size

1-4 staff: 884 · 78%
5-9: 128 · 11%
10-19: 51 · 5%
20-49: 33 · 3%
50+: 35 · 3%

Legal form

Sole traders: 139 · 12%
Partnerships: 34 · 3%
Corporations and LLCs: 584 · 52%
Other or none: 375 · 33%

Of the US total: 1.5%
Of all Houston companies: 0.1%
Against the national share: 1.1×

New

Entered 2026 so far: 35
Entered 2025: 57
Of USA's 2026 entries: 1.2%

Old

Before 1990: 26 · 2%
1990 or later: 1,106 · 98%
Of USA's pre-1990 firms: 1.0%

Reachable

Email: 221 · 20%
Phone: 641 · 57%
Website: 371 · 33%

Revenue (USD)

Under $100K: 657 · 62%
$100K-$500K: 336 · 31%
$500K-$1M: 33 · 3%
$1M and more: 41 · 4%

Largest

11,184
2972
3864
4592
5494

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Firm sizes in the USA

Of the 77,327 US security firms with a known headcount, 65,169 (84%) have one to four people, 6,223 have five to nine, 3,992 have ten to 49 and 1,943 have 50 or more. Most firms turn over under $100,000 a year (49,306, 67%).

EU size bands · the grey line shows all US companies

Micro under 1071,392 92%
Small 10 to 493,992 5%
Medium 50 to 2491,743 2%
Large 250+200 0.3%

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

385

firms turn over more than $5 million a year; 154 more than $10 million.

2,831

firms were entered in 2026.

How many security companies are there in the USA?

Security companies and security firms in the USA

77,446

21 October 2026

There are 77,446 security companies and security firms in the USA in our data (21 October 2026). That is one in every 825 US companies. About 13 new firms are entered in the register every working day this year (2,831 so far in 2026).

Structure

Single-site firms: 72,257 93%
Head offices: 1,081
Branch offices: 4,108

Classification

Our platform filter is SIC 7381.

46,677 of the 77,446 are corporations and LLCs (60%); 5,974 are sole traders. They come from the state business registers and our US register data, through the Company Data API.

Largest security firms 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.

Universal Services of America, LP is the largest security firm in the USA by headcount. 1,943 firms employ 50 people or more; 1,191 employ 100 or more.

1Greenwood Village5,180 staff
2San Diego5,035 staff
3Salem5,008 staff
4East Hartford5,002 staff
5Burbank5,000 staff
6Carolina4,700 staff
7San Antonio4,468 staff
8Gardena4,000 staff
9Victorville3,906 staff
10New York3,407 staff

By employee size · 77,327 firms with a known headcount

Employees	Firms	%
1-4	65,169	84%
5-9	6,223	8%
10-19	2,215	3%
20-49	1,777	2%
50-99	752	1.0%
100-199	585	0.8%
200-499	406	0.5%
500-999	115	0.1%
1,000+	85	0.1%

84% have 1 to 4 people; 1,777 have 20 to 49; 1,943 have 50 or more.

By yearly revenue (USD)

Revenue	Firms	%
< $100K	49,306	67%
$100K-$500K	20,206	28%
$500K-$1M	1,846	3%
$1M-$5M	1,497	2%
$5M-$10M	231	0.3%
$10M-$50M	110	0.2%
$50M-$100M	15	<0.1%
$100M-$500M	18	<0.1%
$500M+	11	<0.1%

67% under $100,000; 1,497 between $1M and $5M; 385 above $5M.

The oldest firms in the USA

Our data holds 3 US security firms from before 1900, 38 from before 1950 and 2,481 from before 1990.

1817
1. North Charleston
1859
1. Cleveland
1885
1. Blue Ash
1900
1. Clark
1901
1. Dayton
1907
1. Sioux City

Older than you

Live tool

Move the slider to a year. Two live counts, scoped to this industry.

1990

2,481

US security firms date from before 1990

220

were entered in 1990

How reachable are they?

Security firms are easier to reach than the average US company: 54% list a phone number and 28% a website.

Email12,589 16%
Phone42,201 54%
Website21,978 28%

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

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

Newcomers in the USA in 2026

2,831 security firms were entered in the US register so far in 2026, about 13 a working day, after 4,220 in 2025. The USA as a whole saw 2,970,531 new companies in 2026, so this industry takes <0.1% of the inflow.

2,8942022
3,5922023
3,6752024
4,2202025
2,8312026 so far

2,803 of this year's 2,831 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.

1San Antonio150 staff
2Kannapolis45 staff
3Livonia35 staff
4New Eagle20 staff
5Fayetteville10 staff

Sole traders or corporations: how they are organised

One in thirteen US security firms work as sole traders, against 5% of all US companies. Three in five are corporations and LLCs.

Sole traders5,9748%
Partnerships7701.0%
Corporations and LLCs46,67760%
No form on record or other24,02531%

Single-site: 93%
Head offices: 1,081
Branches: 4,108

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

How they compare

Next to related industries

There are 2 engineering companies for every security firm in the USA.

Industry	Firms	Website	1-4 staff
Engineering Companies	193,435	40%	75%
Employment Agencies	137,777	31%	82%
Security Companies	77,446	28%	84%
Drycleaners	32,829	59%	81%
Event Companies	14,494	87%	86%
Driving Schools	7,138	92%	84%

In other countries

The USA has more security firms than South Africa or the UK.

Country	Firms	Per 1,000 cos.
The USA	77,446	1.2
South Africa	19,961	2.6
The UK	18,241	2.1
India	13,720	0.4
Germany	11,713	1.7

More countries →

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Frequently asked questions

How many security companies are there in the USA?

There are 77,446 security companies and security firms in the USA in our data, counted on 21 October 2026. That is one in every 825 US companies.

Which is the largest security firm in the USA?

Universal Services of America, LP in Greenwood Village, with 5,180 staff. By revenue Securitas Services in Parsippany leads with $1.6 billion a year.

Which US city has the most security companies?

Houston, with 1,132, ahead of Miami (1,102), Phoenix (741), New York (712) and Los Angeles (656). Relative to its size, Naples has the most: 3.8 times the national share.

How many security firms are there in Houston?

1,132, which is 0.1% of all 881,247 Houston companies and 6% above the national share.

How big is a typical security firm?

Small. 84% of the 77,327 firms with a known headcount have one to four people; 1,943 have 50 or more. Most turn over under $100,000 a year.

Are US security companies sole traders or companies?

One in thirteen (5,974) are sole traders, 1.0% are partnerships and 60% (46,677) are corporations and LLCs.

How many security firms started in 2026?

2,831 were entered in the US register so far in 2026, after 4,220 in 2025. 2,803 of them are corporations and LLCs.

What is the oldest security firm in the USA?

Sumter Guards of Charleston in North Charleston, 1817, followed by Cleveland Brink's Coin in Cleveland (1859) and Merchants Security Systems in Blue Ash (1885). 3 firms date from before 1900.

Which industry code covers security companies?

Our platform filters them on SIC 7381 (detective, guard, and armored car services).

Can I download the full list?

Yes. All 77,446 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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