What are the top 10 advertising agencies?
The largest US-based advertising agencies by revenue in 2026 include (in rough order): BBDO, McCann Worldgroup, Ogilvy, Wieden+Kennedy, Publicis Worldwide, DDB, TBWA, Leo Burnett, Grey Group, and Havas. This ranking shifts annually with billings. For SMB and mid-market alternatives, The Wall's directory lists thousands of independent US agencies at the Marketing pillar.
Why this matters
This question shows up regularly in Google's People Also Ask for the "marketing agency" query, which is a signal that buyers in this space are asking it constantly during their research phase. The answer above is written from The Wall's editorial position — we index 2,286 verified US growth-services vendors across 10 pillars and see how these questions map to actual buying decisions.
If you're evaluating vendors in this category, the Marketing pillar page has the full US firm list with rates, team sizes, and headquarters filters.