Is San Jose Province safe for solo female travelers?

Depends on the area! The San Jose center is very safe , other areas depend. My home in general is ok. Still is latam so it is important to be careful, it doesn't matter the area. We were the safest country in LATAM, however, this reality changed over the time

I feel very comfortable in San Jose overall. Like in every city in the world there are places/zones that are more dangerous and you should always talk with the locals to learn about those and avoid them. I’ve never had any problems in a touristy location. I did get mugged walking alone at night but it was just that one time, so maybe don’t.