Largest annual one-day fundraising event
- Who
- London Marathon
- What
- 1.3 billion UK pound(s) sterling
- Where
- United Kingdom (London)
- When
- 2025
The largest annual one-day fundraising event is the London Marathon (UK) which has raised over £1.3 billion ($1.7b) for charity since 1981, as of the 2025 event.
Recent years have seen over 50,000 runners participate in the race.