Lake Okeechobee is about 1.2 times bigger than London.

London (including the 32 boroughs of greater London) is approximately 1,572 sq km, while Lake Okeechobee is approximately 1,890 km² (730 sq mi), making Lake Okeechobee 20% larger than London.
Tip: This to-scale comparison of London vs. Lake Okeechobee uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.