Download the list of Advertising agencies in England. Smartscrapers provides an accurate directory and the latest data on the number of Advertising agencies in England There are 8699 Advertising agencies in England as of May 5, 2025; which is an 2.54% increase from 2023. Of these locations, 8034 Advertising agencies which is 92.36% of all Advertising agencies in England are single-owner operations, while the remaining 665 which is 7.64% are part of larger brands. The top three cities with the most Advertising agencies are London with 2664 Advertising agencies, Birmingham with 214 Advertising agencies, Leeds with 191 Advertising agencies. Average age of Advertising agencies in England is 5 years and 2 months.