Rome is about 4.5 times bigger than Jackson.

Jackson (map shows its 125 named neighbourhoods; the area covers the whole city) is approximately 289 sq km, while Rome is approximately 1,287 sq km, making Rome 345% larger than Jackson.
Tip: This to-scale comparison of Jackson vs. Rome 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.