Generally speaking Plovdiv is a very safe place. Avoid the ghetto area and you will be very safe. Old town and the main street are generally very busy and safe. Parks during the day are safe avoid them at night unless you are with a larger company.Avoid picking a verbal fight with locals!Avoid wearing football shirts or scarves of the Plovdiv or Sofia-based football teams,especially on match days.Overall the city has improved in terms of safety over the past years.
If you are using public transport always keep an eye on your personal belongings. Many pickpockets take advantage of overcrowded buses like bus line 1, e.g..
