Business Directory USAHow to find US companies nationwide
Over 33 million businesses, 50 states, dozens of industries. Here is how to find the right US companies for B2B prospecting, by state and sector, even if you are selling into the US from abroad.
Find Business··6 min read
33M+
small businesses in the US (SBA Office of Advocacy)
8M+
employer establishments (Census County Business Patterns)
50
state registries, each with its own business search
Definition
What is a US business directory?
A US business directory is a searchable list of American companies with name, address, phone, website, industry and sometimes email. It can be official data from the Census Bureau and state registries, a web directory, or a list generated on demand from live map and web data, filtered by state and industry.
The scale is the first thing to understand. The SBA Office of Advocacy counts more than 33 million small businesses, and the Census Bureau's County Business Patterns tracks over 8 million employer establishments by county and industry. No single directory holds all of them, which is exactly why finding the right companies is a method, not a download.
Demand for that method is real: according to Vonsel internal data (2026), the US is one of the most searched markets among teams prospecting from Latin America and Spain, with restaurants and dentists the most prospected categories overall and New York a consistent top city. If you want the full playbook for any market first, see how to find businesses in any country worldwide.
Key takeaways
No master list exists: combine official data, state registries, Google Maps and a business finder
Use Census and SBA data to size a state or industry before you build a contact list
CAN-SPAM, not consent, governs US B2B email, so selling into the US from abroad is very doable
Per Vonsel internal data (2026), the US is a top market for teams prospecting from LatAm and Spain
The 4 sources
Where to find US businesses (4 sources that actually work)
There is no single American business directory. Instead, four sources stack together, from broad market sizing down to a ready-to-contact list:
1
Census and SBA data: size the market
Census County Business Patterns and the Statistics of US Businesses (SUSB) tell you how many companies exist by state, county and NAICS industry. They are free and authoritative, but aggregate: counts, not contacts. Use them to decide where to focus.
2
State directories: confirm the legal entity
Every state runs a Secretary of State business search with legal name, status, formation date and registered agent. Perfect for verifying a company is real and active before you reach out, but slow to scan one state at a time and with no email or phone.
3
Google Maps: find the local operators
Most US businesses are storefronts that never appear in static lists. Search an industry plus a city and Google Maps returns name, address, phone, website, hours and reviews. Great signal, but copying it by hand is the bottleneck.
4
A business finder: turn it into a list
A business finder combines live map and web data into one export filtered by state, city and industry, with verified email and phone per company. It is how teams find business emails at national scale without scraping 50 registries by hand.
Build a US prospect list in minutes
Search any state, city or industry across the USA and get verified emails, phones and Google ratings per company, fresh data, no scraping.
Nationwide is the wrong unit for prospecting. The market is too large and too uneven, so you slice it down. Census and SBA data show where each industry concentrates, then you target the states and metros that matter for your offer:
Slice
How to define it
Why it matters
By state
California, Texas, Florida, New York lead on company count
Concentrates outreach where the density of targets is highest
By metro
City plus surrounding county on the map
Local operators cluster by metro, not by state line
Solo operator vs multi-location, by rating and reviews
Budget and decision maker differ wildly by company size
If you sell to a specific city, start there: our guides to businesses in New York and Miami show the same method applied to one metro, with local sources and search tips.
The hard part of a US directory is not finding companies, it is finding the right ones with a working email and enough context to write a relevant first line. A million names you cannot contact is not a prospect list.
Selling into the US from abroad
Prospecting US companies from outside the United States
You do not need to be in the US to sell to it. US business data is public, and the rules for first contact are more permissive than in Europe. Cold email to American companies is governed by CAN-SPAM, which requires honesty and an opt-out rather than prior consent. This box answers the questions teams in Madrid, Mexico City or Bogotá ask most:
Selling to the US from outside: quick diagnostic
Do I need consent?No. CAN-SPAM allows B2B cold email without opt-in, as long as headers are truthful, the subject is not deceptive, you include a physical address and a working unsubscribe link.
What about time zones?Schedule sends for the recipient's local business hours. The US spans six time zones, so segment by state and stagger your campaigns.
Language and tone?Write in US English, lead with the value to their business, and keep it short. A reference to the company's reviews or location beats any generic template.
Do I need a US entity?Not to prospect. A valid sender identity and a real address, anywhere, satisfies CAN-SPAM. Many teams sell into the US for months before incorporating there.
The United States is also one of the largest single English-speaking B2B markets, which is why so many teams abroad build a US list before any other. The HubSpot sales statistics consistently show email as the preferred first business touchpoint, which is exactly what makes a clean, verified US list so valuable from anywhere in the world.
How Vonsel helps
How Vonsel builds your US business directory
Vonsel's Business Finder searches millions of verified businesses across 120+ countries, the USA included. Type an industry plus any US state, metro or city and get every company with name, address, phone, website, Google rating and email, at 85-95% email accuracy and 90%+ phone accuracy. Filter by state and sector, then let Smart Reviews summarize each company's Google reviews with AI so you can personalize before you write. Because it runs from anywhere, a team in Spain or Mexico can build the same nationwide US list as one in Chicago. Plans on the pricing page start at $17.99/month, and you get 20 verified leads when you start the free plan.
In short:
Size the market with Census and SBA data, then build the list with live data.
Filter by state, metro, industry and size instead of chasing one giant directory.
Selling into the US from abroad is legal under CAN-SPAM and works from any country.
Your US business directory, filtered and verified today
Search any US state or industry, export verified emails and phones per company, and let AI summarize their reviews for instant personalization, from anywhere. See plans.
A US business directory is a searchable list of American companies with details like name, address, phone, website, industry and sometimes email. It can come from official sources like the Census Bureau and Secretary of State registries, from web directories, or be generated on demand from live map and web data.
How many businesses are there in the USA?
The US has more than 33 million small businesses according to SBA Office of Advocacy figures, and the Census Bureau counts over 8 million employer establishments in its County Business Patterns program. The vast majority are small, local companies spread across every state and industry.
Where can I find a free list of US companies?
Census County Business Patterns and SUSB give free aggregate counts by industry and county. Each state Secretary of State runs a free business entity search for legal records. Google Maps is free for finding local operators, but none of these export a ready-to-email contact list on their own.
How do I find US businesses by state and industry?
Start with Census data to size each state and NAICS industry, then search the Secretary of State registry for legal entities and Google Maps for active operators. A business finder lets you filter by state, city and industry in one search and export verified contact data per company.
Can I prospect US companies from outside the United States?
Yes. US business data is public and a business finder works the same from Madrid, Mexico City or anywhere else. US B2B cold email is regulated by CAN-SPAM, which requires accurate sender details and a working unsubscribe link, not prior consent, making it more permissive than GDPR for first contact.
Is it legal to cold email US businesses?
Yes, US B2B cold email is legal under CAN-SPAM, which requires truthful headers, a valid physical address, no deceptive subject lines and a working opt-out you honor within ten business days. Some states add rules, so keep your list clean and respect every unsubscribe request immediately.
What is the best way to build a US prospect list?
Combine official data for market sizing with live map and web data for actual contacts. The fastest route is a business finder that searches an industry plus a US city, returns verified email, phone, website and Google rating per company, and exports a filtered list in minutes instead of weeks.
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