Marshalltown is a relatively small and peaceful community in the United States. Violent crimes are below the country's average, making it a reasonably safe place for solo female travelers. However, like any destination, it is recommended to always remain alert, especially at night or in less populated areas. Local people are friendly and willing to help in case of need. It's advisable to stay in well-lit and populated areas after dark and keep your personal belongings secure at all times.