Seattle is about 1.9 times smaller than Venice.

Venice is approximately 415 sq km, while Seattle is approximately 217 sq km, making Seattle 52.42% the size of Venice.
Tip: This to-scale comparison of Venice vs. Seattle 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.