Saint Paul is about 2.1 times smaller than Jackson.

Jackson (map shows its 125 named neighbourhoods; the area covers the whole city) is approximately 289 sq km, while Saint Paul is approximately 135 sq km, making Saint Paul 46.54% the size of Jackson.
Tip: This to-scale comparison of Jackson vs. Saint Paul 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.