Advertising agencies across the U.S.
10,329 advertising agencies listed. Pick a state or one of the busiest cities.
USA Business Search lists 10,329 advertising agencies nationwide. California has the most (3,003), and the busiest cities are Manhattan, NY, Los Angeles, CA, Houston, TX.
Updated October 2026Show up in Google and in AI answers, not on page three.
Eye To Ad Media builds SEO, AI search optimization and custom-coded websites for U.S. businesses. Headquartered in Denver, growing businesses worldwide.
- 5.0 on Google, 60 reviews
- 2012 founded
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By state
Busiest cities
Still comparing U.S. agencies?
Run a free 60-second checkup on your listing and website first. You'll know exactly what's missing before you talk to anyone.
How to choose an advertising agency
- Ask how they track ads to real calls, forms and sales, not just clicks.
- Make sure your ad accounts are in your name, not the agency's.
- Ask what the management fee is and what the ad spend is, separately.
How U.S. businesses get found in Google and AI answers
- Claim and complete your Google Business Profile, then keep hours, photos and services current.
- Use the same business name, address and phone everywhere you are listed, including directories like this one.
- Publish pages that answer the questions customers actually ask, so ChatGPT, Gemini, Perplexity and Google AI Overviews can cite you.
- Add LocalBusiness schema, clear pricing and service pages so AI assistants and booking agents can read your details.
Learn more: SEO vs. AI search optimization · Get found on Google Maps and in AI answers · How to pick an SEO company
Common questions
How many advertising agencies are listed on USA Business Search?
10,329 across 7 states: California (3,003), Florida (2,242), Texas (2,014), New York (1,918), Colorado (521), Arizona (505), Nebraska (126).
Which cities have the most advertising agencies?
Manhattan, NY (1,041), Los Angeles, CA (437), Houston, TX (358), Denver metro, CO (320), Miami, FL (306).
How do I choose an advertising agency?
Ask how they track ads to real calls, forms and sales, not just clicks. Make sure your ad accounts are in your name, not the agency's. Check the license or registration with your state or city where one is required.
How do I add or fix a listing?
Listings are free. Use Add your business, or the Claim or fix link on any listing.
What should I ask a your city marketing agency before I hire them?
Ask who will actually do the work, how they track calls and forms, and what happens to your accounts if you leave. Eye To Ad Media offers a free review of how your business shows up in Google and AI answers.
What is AI search optimization (AIO or GEO)?
It is the work of making your business easy for AI assistants like ChatGPT, Gemini and Google AI Overviews to understand, trust and recommend: consistent listings, structured data, and pages that answer real customer questions. Read SEO vs. AI search optimization.