Pulmonary hypertension (PH) is a condition characterized by increased pressure in the pulmonary circulation. It may be idiopathic or arise in the setting of other clinical conditions. Imaging plays an important role in the evaluation and management of PH, including diagnosis, establishing etiology, prognostication and assessment of response to therapy. Multiple imaging modalities are available, including radiographs, computed tomography, magnetic resonance imaging, nuclear medicine, echocardiography and invasive catheter angiography. Some features seen on cross sectional imaging can suggest a subtype or probable cause of PH that may facilitate placing the patient in the correct category. It is crucial to understand the advantages and disadvantages of the different imaging tools available for the diagnostic work-up and follow-up of patients with pulmonary hypertension.