Trenton is about 8 times smaller than Richmond.

Richmond is approximately 155 sq km, while Trenton is approximately 20 sq km, making Trenton 12.69% the size of Richmond.
Tip: This to-scale comparison of Richmond vs. Trenton 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.