If you live in federal hill (and parts of the West end close to federal hill), Fox point, the jewelry district, or downtown I'd say it's extremely walkable.

Federal Hill has a walk score of 93, Fox point has a 94 and downtown has a 99

https://www.walkscore.com/RI/Providence/Federal_Hill https://www.walkscore.com/RI/Providence/Fox_Point

It definitely depends on the neighborhood

I've been to Portland Maine and from what I can tell just the downtown area is walkable. The rest of it doesn't have much goin without driving somewhere.