Athens is about 3.2 times bigger than Salem.

Salem (map shows its 1 named neighbourhoods; the area covers the whole city) is approximately 127 sq km, while Athens (map shows its 34 named neighbourhoods; the area covers the whole city) is approximately 412 sq km, making Athens 225% larger than Salem.
Tip: This to-scale comparison of Salem vs. Athens 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.