Buffalo is around the same size as Eugene.

Eugene is approximately 115 sq km, while Buffalo is approximately 105 sq km, making Buffalo 90.76% the size of Eugene.
Tip: This to-scale comparison of Eugene vs. Buffalo 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.