Australian Capital Territory is about 1.2 times bigger than Lake Okeechobee.

Lake Okeechobee is approximately 1,890 km² (730 sq mi), while Australian Capital Territory is approximately 2,358 km² (910 sq mi), making Australian Capital Territory 25% larger than Lake Okeechobee.
Tip: This to-scale comparison of Lake Okeechobee vs. Australian Capital Territory uses the Mercator projection, which distorts the size of regions near the poles.

Compare further: Australian Capital Territory vs. Lake Okeechobee

Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.