B2B cold email software in Maryland
Verified federal data on the Maryland business market, plus outreach guides for its largest cities and service industries. Acqro researches every company on your list and writes each email from what it finds.
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How many businesses are in Maryland?
Maryland had 142,967 business establishments in 2023, ranking 22nd among the 50 states and DC, with 40,108 of them employing 10 to 249 people. Source: U.S. Census Bureau County Business Patterns. Acqro is AI cold email software that researches each of those companies before writing to them.
The Maryland B2B market in numbers
- Business establishments
- 142,967+0.3% vs 2022Census CBP 2023
- Firms with 10–249 employees
- 40,108Census CBP 2023
- Paid employees
- 2,468,367Census CBP 2023
- Average annual pay
- $68,097Census CBP 2023
- Professional services firms
- 21,699Census CBP 2023, NAICS 54
- Share of US establishments
- 1.7%Census CBP 2023
71.2% of establishments in Maryland have fewer than 10 employees, below the 73.0% share for the United States. The 40,108 establishments with 10 to 249 employees are where most B2B lists should start: large enough to have a budget and a defined buyer, small enough that an owner or department head still makes the call and reads their own email.
By employment, the largest sectors are health care and social assistance (16.4% of jobs) and professional, scientific and technical services (12.2% of jobs). Relative to the national mix, professional, scientific and technical services (12.2% locally against 7.4% nationally) and educational services (3.6% locally against 2.8% nationally) stand out, which makes them natural first segments for outbound.
The number of establishments changed by +0.3% between 2022 and 2023, slower than the +0.8% change for the United States. New and growing businesses are the accounts most likely to be choosing vendors for the first time, so pair that list with research on hiring, new locations and leadership changes before writing a single email.
Largest industries in Maryland
Sectors ranked by paid employment, compared with the national mix.
| Sector | Establishments | Employees | Avg. annual pay | Share of jobs | US share |
|---|---|---|---|---|---|
| Health care and social assistance | 18,859 | 403,945 | $65,174 | 16.4% | 15.8% |
| Professional, scientific and technical services | 21,699 | 301,509 | $108,007 | 12.2% | 7.4% |
| Retail trade | 16,687 | 289,469 | $37,719 | 11.7% | 11.5% |
| Administrative, support and waste management services | 8,340 | 256,840 | $52,878 | 10.4% | 9.6% |
| Accommodation and food services | 12,744 | 241,483 | $27,208 | 9.8% | 10.4% |
| Construction | 14,528 | 167,451 | $76,925 | 6.8% | 5.5% |
| Other services | 14,680 | 112,568 | $52,084 | 4.6% | 4.0% |
| Manufacturing | 2,838 | 109,929 | $82,718 | 4.5% | 8.8% |
| Finance and insurance | 7,054 | 98,329 | $122,940 | 4.0% | 5.0% |
| Transportation and warehousing | 4,002 | 96,536 | $54,102 | 3.9% | 4.7% |
Where Maryland businesses are concentrated
Counties ranked by number of business establishments.
| County | Establishments | Share of state | Employees |
|---|---|---|---|
| Montgomery County | 27,677 | 19.4% | 439,792 |
| Baltimore County | 20,340 | 14.2% | 340,854 |
| Prince George's County | 16,350 | 11.4% | 276,055 |
| Anne Arundel County | 14,718 | 10.3% | 245,664 |
| Baltimore city | 12,383 | 8.7% | 301,759 |
| Howard County | 10,050 | 7.0% | 185,946 |
| Frederick County | 6,591 | 4.6% | 95,077 |
| Harford County | 5,636 | 3.9% | 79,488 |
| Carroll County | 4,279 | 3.0% | 53,981 |
| Washington County | 3,417 | 2.4% | 61,729 |
Cold email guides for Maryland cities
Each guide covers the county that contains the city.
| City | County | Establishments in county |
|---|---|---|
| Baltimore | Baltimore city | 12,383 |
| Frederick | Frederick County | 6,591 |
| Gaithersburg | Montgomery County | 27,677 |
| Rockville | Montgomery County | 27,677 |
B2B service industries in Maryland
Establishment counts in Maryland for the service industries Acqro customers work in. Each links to an outreach guide.
| Industry | Census industry (NAICS) | Establishments |
|---|---|---|
| Law Firms | Offices of Lawyers | 2,615 |
| Management Consultants | Administrative Management and General Management Consulting Services | 2,466 |
| Healthtech Vendors | Computer Systems Design Services | 2,327 |
| Commercial Real Estate Brokers | Offices of Real Estate Agents and Brokers | 2,264 |
| Software Development Agencies | Custom Computer Programming Services | 2,176 |
| Commercial Insurance Brokers | Insurance Agencies and Brokerages | 1,855 |
| Commercial Cleaning Companies | Janitorial Services | 1,436 |
| CPA and Accounting Firms | Offices of Certified Public Accountants | 1,050 |
| SEO Agencies | Marketing Consulting Services | 694 |
| Staffing Agencies | Temporary Help Services | 688 |
| Cybersecurity Firms | Other Computer Related Services | 488 |
| Financial Advisory Firms | Investment Advice | 408 |
| Architecture Firms | Architectural Services | 345 |
| Corporate Caterers | Caterers | 283 |
| SaaS Companies | Software Publishers | 270 |
| Office Design Firms | Interior Design Services | 239 |
| Managed Service Providers | Computer Facilities Management Services | 236 |
| Logistics Providers | Freight Transportation Arrangement | 217 |
| Commercial Waste Services | Solid Waste Collection | 210 |
| HR Consultancies | Human Resources Consulting Services | 191 |
| Video Production Companies | Motion Picture and Video Production | 191 |
| Marketing Agencies | Advertising Agencies | 176 |
| PR Agencies | Public Relations Agencies | 162 |
| Corporate Training Providers | Professional and Management Development Training | 156 |
| Event Management Companies | Convention and Trade Show Organizers | 113 |
| Payroll Providers | Payroll Services | 107 |
| Executive Search Firms | Executive Search Services | 92 |
| Translation Services | Translation and Interpretation Services | 82 |
| Business Telecom and VoIP Providers | Telecommunications Resellers | 82 |
| Merchant Services Providers | Financial Transactions Processing, Reserve, and Clearinghouse Activities | 70 |
Cold email in Maryland, answered
How many businesses are in Maryland?
Maryland had 142,967 business establishments in 2023, employing 2,468,367 people. Source: U.S. Census Bureau, County Business Patterns 2023.
What are the largest industries in Maryland?
By paid employment in 2023: health care and social assistance (16.4% of jobs), professional, scientific and technical services (12.2% of jobs) and retail trade (11.7% of jobs). Source: U.S. Census Bureau, County Business Patterns 2023.
Is cold email legal in the United States?
Yes. The federal CAN-SPAM Act permits commercial email to business contacts without prior consent, provided the message identifies the sender accurately, uses a truthful subject line, includes a valid physical postal address and a working opt-out, and honours opt-out requests promptly. CAN-SPAM applies in every state and preempts most state commercial email laws, except provisions aimed at falsity or deception. This is general information, not legal advice.
Explore related pages
Guides for Maryland
Other states
Sources and methodology
Every figure on this page comes from a federal statistical release and is shown with its source and reference year. Figures the agencies withhold or publish with high noise are left out rather than estimated. Page updated September 17, 2026.
- U.S. Census Bureau, County Business Patterns 2023 and 2022: establishments, paid employment for the pay period including March 12, annual payroll, and establishments by employment size. Industries use NAICS 2017 codes.
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