This dataset contains anonymised data from 107 individuals diagnosed with Parkinson’s Disease (PD), collected as part of a remote study investigating the relationships between apathy, alexithymia, emotion regulation (ER) strategies, and mental health outcomes. Data include demographic and clinical variables (e.g., age, gender, ethnicity, education, age of diagnosis, illness duration, levodopa equivalent daily dose, motor and non-motor aspects of daily living, and global cognition, and validated questionnaires assessing apathy, alexithymia, anxiety, depression, mental wellbeing and both cognitive and behavioural ER strategies. Data were collected via video call and online survey platforms. The dataset has been fully de-identified and stored in .csv format. It may be of interest to researchers studying interactions between apathy, alexithymia, and ER symptoms in PD.