Coffee is an agricultural commodity that is of great economic importance to Indonesia. One factor contributing to declining coffee productivity is the presence of weeds growing alongside coffee plants. Herbicides are chemicals widely used to suppress weed growth. This study aims to determine the effectiveness of paraquat dichloride herbicide in suppressing weed growth in unproductive Arabica coffee plantations and to assess its phytotoxicity on coffee plants. The study was conducted from November 2024 to January 2025 in Tanjungkarya Village, Samarang Subdistrict, Garut Regency, West Java Province. The treatments consisted of five doses of paraquat dichloride: 2.25 l/ha, 3.00 l/ha, 3.75 l/ha, 4.50 l/ha, and 5.25 l/ha, and were compared with manual weeding and a control (without control). The study used a Randomized Block Design with 4 replications. Based on the results, it was found that paraquat dichloride at a dose of 2.25 l/ha was effective in suppressing the growth of total weeds, including the dominant weeds Synedrella nodiflora, Setaria verticilata, and Cynodon dactilon, up to 8 weeks after application, and did not cause phytotoxicity in the coffee plants that had not yet produced fruit.