While there are many conveniences that the widespread use of the Internet provides us today, there are also some risks that come with these conveniences. One of these risks is the disclosure of personal data. Personal data can be defined as any information regarding an identified or identifiable real person. It can be argued that wide use of digital environments makes it easier to access, collect and share personal data. This highlights the importance of having necessary knowledge and skills about sharing and protecting personal data, especially for university students who are actively involved in digital platforms. Therefore, this study aimed to investigate pre-service teachers' awareness levels and related behaviors of personal data privacy in online spaces. It was designed as a small scale survey within the context of quantitative research methods. Using a convenience sampling, participants were made up of 76 students enrolled in various teacher education programs in a major university in Türkiye. Data were collected through an online questionnaire form developed using relevant studies in literature. While the majority of the participants were found to be aware of the concept of personal data and its privacy and protection, approximately half of them were not aware of the regulation on this subject. They reported security (law enforcement), health and public institutions as the institutions they trusted most in protecting personal data. They stated that they did not share their personal data when filling out online surveys and using free trials of any software. Most preferred to share their names, photos, videos, schools, towns but not to share phone numbers, addresses and e-mails on social media. They tend to contact the police instead of the Prosecutor's Office and the relevant board in case their personal data is misused. [For the complete proceedings, see ED672779.]