Top 7 Advertising companies in South Korea
This curated ranking covers the 7 largest advertising companies in South Korea, ordered by estimated audience size from Rascasse's anonymized search-behavior signals. AdMob, Ogilvy & Mather and BBDO lead the list with a combined estimated audience of 36,092 people. Across all 7 entries the average audience size is 5,349, and the largest, AdMob, reaches around 29,001 people in South Korea. Audience size is the estimated number of unique people in South Korea who actively engage with each advertising company, derived from search demand signals. Rankings reflect search-behavior signals collected across South Korea and are refreshed weekly.
Ranking
| Rank | Name | Audience size | Country share | Subtype | Category |
|---|---|---|---|---|---|
| 1 |  AdMob |
29,001 | 2.5% | Advertising company | Business & Career |
| 2 |  Ogilvy & Mather |
4,962 | 0.7% | Advertising company | Business & Career |
| 3 |  BBDO |
2,129 | 1.2% | Advertising company | Business & Career |
| 4 |  Saatchi & Saatchi |
656 | 0.1% | Advertising company | Business & Career |
| 5 |  TBWA Worldwide |
315 | 0.7% | Advertising company | Business & Career |
| 6 |  Interpublic Group of Companies |
262 | 0.7% | Advertising company | Business & Career |
| 7 | DDB Worldwide |
119 | 0.3% | Advertising company | Business & Career |
Frequently asked questions
How is this Top 7 list compiled?
Rascasse aggregates anonymized search-behavior signals across South Korea and ranks each advertising company by its estimated audience size. Only entries with at least 5 measured entities are listed.
How often is the list updated?
The ranking is refreshed weekly from the latest search-behavior data and re-published as a static page.
What is the largest advertising company in South Korea?
AdMob currently leads with an estimated audience of 29,001 people in South Korea.
Methodology
Audience sizes are estimated from anonymized search-behavior signals across South Korea. Lists below 5 entries are not published. See methodology for full details.