​Purpose: The study's goal is to investigate how a green supply chain (green purchasing, green operations, green selling, green distribution, and green marketing) can affect environmental performance in Jordanian pharmaceutical industries firms.Design/Methodology/Approach: The survey unit of analysis is made up of 50 out of 245 managers who work at Pharmaceutical Manufacturing Organizations and were available at the time the questionnaires were distributed. The normality, validity, and reliability of the study tool were confirmed, followed by a descriptive analysis and the calculation of the correlation between variables. Finally, the impact of Green Supply Chain was tested using multiple regressions.Finding:The study's findings indicate that the green supply chain has a positive impact on the environmental performance of Jordanian pharmaceutical companies. Green selling has the greatest impact on environmental performance, followed by green purchasing, green labeling, green distribution, and green operations.Recommendations: The study suggests that Jordanian Pharmaceutical Manufacturing Organizations incorporate Green Supply Chain into their supply chain management strategic plans.Practical and Managerial Implications:Implementing a Green Supply Chain in Jordanian Pharmaceutical Industries Firms increased Environmental Performance. As a result, incorporating Green Supply Chain into Supply Chain Management strategies will increase competitive advantages. Originality/value: Originality/Value: Although the green supply chain is a popular concept, little is known about its current status in Jordan, aside from a few case studies. The study investigates the extent of green supply chain practices in Jordanian pharmaceutical companies' factories and their impact on environmental performance. The study also highlights the link between green supply chain dimensions/practices and environmental performance.Keywords: Green Supply Chain, Environmental Performance, Jordanian Pharmaceutical Industries Firms.​