As of the 2021 census, Muslims comprise 15% of London’s population, making Islam the city’s second-largest religion after Christianity. 

The highest concentrations of Muslims are found in East London, particularly in the boroughs of Tower Hamlets and Newham. In Tower Hamlets, 39.9% of residents identify as Muslim, while in Newham, the figure is 34.8%. 

Beyond East London, other boroughs with significant Muslim populations include Redbridge (31.3%), Waltham Forest (21.6%), Brent (21.4%), and Ealing (18.8%).