Zenica is generally safe for solo female travelers. Like most cities, there are always risks but they are relatively low here. Petty crime like pickpocketing could be a problem, especially in crowded areas, but violent crime is rare. The locals are friendly and helpful. Always use common sense, stay in well-populated areas, especially at night, and keep an eye on your belongings. Public transportation is reliable, but it's advisable to learn a few basic phrases in the local language as English is not widely spoken.