Creative hubs: Exploring the 15 biggest agency cities

May 22, 2025 | 7 min read

Up to now in our mapping of the UK agency sector we have focused on ITL1 regions when it comes to looking at agency clusters or hubs. But we can explore the data of the UK’s marketing, advertising, creative and media agencies in many different ways, so we decided to take a closer look at the 15 biggest agency cities in the country, based on the number of individual agencies based there.

Of course, there are a number of ways we could have decided to select our “15 biggest agency cities”, but for the purposes of this article we used the number of registered agencies (companies) within the OECD-defined functional urban areas (FUA) in the UK.

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