Dortmund has its few odd people that will yell at you for no reason (steer clear of central station) but it can be lovely too!! I‘ve felt safe walking around at night actually, you just gotta be about your wits like anywhere else too

In general, Dortmund is quite safe, especially during the day. However, I would be more careful and cautious when walking in Nordstadt. It’s best to choose places like Phoenixsee or the city center for a walk.

Dortmund it’s really safe, very quiet and peaceful, it can be a little be dangerous in the central station at night, a lot of homeless, also can be a little bit dangerous when there’s a BVB Game because there’s a lot of drunk people (that’s what I see in the news), but I don’t have any safety problems here, I think it’s only that I would say

Dortmund is basically safe. However, I would avoid deserted streets after dark. I would also avoid large groups of men. If you're not obviously carrying expensive items, there's little risk of being robbed. Public transportation is very safe.