IT and security in Nassau County, NY.

21.1 miles from City Hall, and we work on site here. Below is what public records show about organisations in Nassau County, and what it means for yours.

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  1. 50 miles from City Hall: 22 counties, read for the peer index.
  2. 75 miles from City Hall: 11 counties, not read.
  3. 100 miles from City Hall: 15 counties, not read.
  4. Hudson, New Jersey, 3.5 miles from City Hall: 124 organisations, 45 of 73 domains with a mail guard.
  5. New York, New York, 4.8 miles from City Hall: 3,340 organisations, 2,001 of 2,527 domains with a mail guard.
  6. Kings, New York, 5 miles from City Hall: 1,041 organisations, 388 of 562 domains with a mail guard.
  7. Queens, New York, 9 miles from City Hall: 517 organisations, 189 of 290 domains with a mail guard.
  8. Richmond, New York, 10.9 miles from City Hall: 111 organisations, 47 of 70 domains with a mail guard.
  9. Bronx, New York, 11.4 miles from City Hall: 394 organisations, 158 of 241 domains with a mail guard.
  10. Essex, New Jersey, 11.6 miles from City Hall: 362 organisations, 172 of 243 domains with a mail guard.
  11. Bergen, New Jersey, 14.4 miles from City Hall: 311 organisations, 128 of 188 domains with a mail guard.
  12. Union, New Jersey, 15.5 miles from City Hall: 173 organisations, 84 of 120 domains with a mail guard.
  13. Passaic, New Jersey, 17.5 miles from City Hall: 143 organisations, 49 of 81 domains with a mail guard.
  14. Nassau, New York, 21.1 miles from City Hall: 564 organisations, 199 of 288 domains with a mail guard.
  15. Westchester, New York, 24.8 miles from City Hall: 529 organisations, 273 of 388 domains with a mail guard.
  16. Middlesex, New Jersey, 25.5 miles from City Hall: 202 organisations, 80 of 125 domains with a mail guard.
  17. Morris, New Jersey, 27.8 miles from City Hall: 189 organisations, 100 of 143 domains with a mail guard.
  18. Rockland, New York, 28.7 miles from City Hall: 212 organisations, 50 of 86 domains with a mail guard.
  19. Monmouth, New Jersey, 30.1 miles from City Hall: 238 organisations, 101 of 149 domains with a mail guard.
  20. Somerset, New Jersey, 31.8 miles from City Hall: 114 organisations, 60 of 81 domains with a mail guard.
  21. Sussex, New Jersey, 42.8 miles from City Hall: 38 organisations, 23 of 27 domains with a mail guard.
  22. Fairfield, Connecticut, 47.7 miles from City Hall: 518 organisations, 300 of 417 domains with a mail guard.
  23. Hunterdon, New Jersey, 47.7 miles from City Hall: 43 organisations, 25 of 34 domains with a mail guard.
  24. Suffolk, New York, 47.9 miles from City Hall: 509 organisations, 185 of 308 domains with a mail guard.
  25. Mercer, New Jersey, 48.2 miles from City Hall: 331 organisations, 175 of 244 domains with a mail guard.
  26. Across the 22 counties: 4,796 of 6,642 domains guarded.
Nassau County, NY on the map of the 22 counties within 50 miles of City Hall, each sized by how many organisations it holds.
Form 990s, public DNS · 3 Oct 2026
  • People 1,395,774 2020 Census Census 2020
  • Registered nonprofits 8,672 7,576 of them charities IRS exempt list · 2 Oct 2026
  • Nonprofits over $1M 564 285 over $5M IRS exempt list · 2 Oct 2026
  • IT service businesses 808 Computer services, NAICS 5415 Census CBP 2023
  • From City Hall 21.1 mi By centre of population Census 2020 centres · 2 Oct 2026

What stands out in Nassau County

Compared with all 22 counties within 50 miles of City Hall.

Who works in Nassau County

Organisations here that insurers, regulators and funding programs ask about security. Each one leads to a free calculator.

If your data is breached in New York

Tell affected New Yorkers within 30 days of finding the breach. Notify the Attorney General, the Department of State and the State Police, and the Department of Financial Services if it regulates you.

N.Y. Gen. Bus. Law § 899-aa, as amended by Chapter 647 of the Laws of 2024 (S.2659-B) and Chapter 91 of the Laws of 2025 (S.804)

What the statute says about timing
The disclosure shall be made in the most expedient time possible and without unreasonable delay, provided that such notification shall be made within thirty days after the breach has been discovered, except for the legitimate needs of law enforcement, as provided in subdivision four of this section.
(a) In the event that any New York residents are to be notified, the person or business shall notify the state attorney general, the department of state, the division of state police, and the department of financial services as to the timing, content and distribution of the notices and approximate number of affected persons and shall provide a copy of the template of the notice sent to affected persons; provided, however, that notice to the department of financial services shall only be required if the person or business is a covered entity, as defined in 23 NYCRR 500.1, and provided further that such notice shall be provided to the department of financial services in compliance with 23 NYCRR 500.17. Such notice shall be made without delaying notice to affected New York residents.

NY Assembly, enacted bill text, read 3 Oct 2026

Get an incident plan in place

How Nassau County nonprofits protect their email

Of the 288 websites of nonprofits over $1M here, 90 block or junk emails that fake their address (DMARC).

Form 990s, public DNS · 3 Oct 2026

Check your own domain →
Nonprofits over $1M, by DMARC setting
288 websites read in Nassau County
  • Blocks or junks fake email9031%
  • Has DMARC, lets fakes through10938%
  • No DMARC at all8931%

Form 990s, public DNS · 3 Oct 2026
Nassau County against all 22 counties
Share of websites read
Nassau County against all 22 counties
CategoryNassau CountyAll 22 counties
Blocks or junks fakes31%31%
Lets fakes through38%42%
No DMARC31%28%

Form 990s, public DNS · 3 Oct 2026

Which email system they use

Most larger nonprofits in Nassau County run their email on Microsoft 365.

Migrations →
Email system, by share of websites read
Email system, by share of websites read
CategoryNassau CountyAll 22 counties
Microsoft 36549%47%
Google Workspace34%39%

Form 990s, public DNS · 3 Oct 2026

Nassau County nonprofits by size

8,672 organisations are registered here, by the revenue they last reported to the IRS.

IRS exempt list · 2 Oct 2026

Registered nonprofits, by reported revenue
Registered nonprofits, by reported revenue
CategoryOrganisations
No revenue filed2,868
$0 reported3,116
Under $1M2,124
$1M to $5M279
$5M or more285

IRS exempt list · 2 Oct 2026

Deadlines that apply in New York

Federal rules, Microsoft end-of-support dates and the state's own rules.

All deadlines →
  1. CMMC, from 14 Oct to 4 Nov.
  2. Windows, from 14 Oct to 4 Nov.
  3. Form 990, from 14 Oct to 11 Nov.
  4. NY CHAR500, from 14 Oct to 11 Nov.
  5. Windows Server, from 11 Nov to 6 Jan.
  6. Huntress agent OS support, from 11 Nov to 6 Jan.
  7. Today is 14 Oct 2026.
  8. The next date is Next, 10 Nov 2026: CMMC.
Deadlines in the next 15 weeks, with two months before each to prepare.

Towns in Nassau County, and nearby counties

IRS exempt list · 2 Oct 2026

Projects for organisations in Nassau County

Fixed price, written dates, on site when the work needs it.

All projects →

Working in Nassau County?

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