Decatur, USA is generally safe for solo female travelers. Many locals are friendly and willing to provide assistance if necessary. The town is lit well at night and the crime rate is relatively low, especially in concerned to violent crimes. It's always crucial, however, to stay watchful and attentive to your surroundings. Always ensure that your personal belongings are secure. Public transport is reliable but it's advisable to avoid late-night travel. As with everywhere, basic safety protocols apply.