This study aims to provide a baseline report of the apportionment of stranded plastic debris (macro) in Bintan Island beaches. Their quantity and composition were assessed during a 45-day survey demonstrating the occurrence of the 3378 plastic fragments, which were, in decreasing order, constituted by LDPE (22.9%), PS (19.5%), PP (16.6%), PET (10.4%), HDPE (9.2%), PVC (7.2%), PU (4.9%), polyester (4.7%), polyamide (4.3%), and styrene/butadiene (0.3%). The abundance ranged from 1.2 to 4.7 items/m 2. Additional apportionment ranged from 0.03 to 0.15 items/m 2 per day with an arithmetic mean of 0.09 ± 0.05 items/m 2 per day, mainly related to domestic waste influenced by hydrodynamic action such as longshore current and wind dynamics. Furthermore, we suggested mitigation measures focused on local action to address the plastic debris problem in Bintan beaches, which are typical of the coasts of small islands in Indonesia. Since 2015, plastic pollution has attracted public attention in Indonesia. After being declared as the second largest plastic contributor to the marine environment (Jambeck et al., 2015), through public information dissemination acts, i.e., conferences, seminars, and community action, all related stakeholders (academia, business sector, community , government, and media) enforced their roles to solve the claimed problem. However, the Indonesian Government has stipulated recent regulations through Presidential Decree No. 83 concerning waste handling in the sea, which constituted the national action plan to reducing 70% of marine plastic in the marine environment by the year 2025 (Perpres 83/2018). Nevertheless, the real data to contradict Jambeck's model are still lacking in Indonesia. Limited studies have been conducted by Indonesian scientists. Marine contamination with plastic debris has been reported in the Indonesian area by several authors. For instance, Syakti et al. (2017, 2018) reported the occurrence of macroplastics and floating microplastics in the southern part of Java in the adjacent Indian Ocean and the Bintan area. Cordova et al. (2018) reported the presence of microplastics in coral reef sediment in Lombok and in the deep sea of the southwestern Sumatra coast (Cordoba and Wahyudi, 2016). Recent studies were also conducted on the occurrence of microplastics in biota (Rochman et al. 2015; Lubis et al., 2019) and the absorbed co-pollutants, i.e., PAHs and PCBs (Bouhroum et al. 2019), as well as the impact of microplastics (Syakti et al. 2019). The present study investigated the apportionment of stranded plastic debris (macro) on Bintan Island (Fig. 1), an area in Indonesia that is close to the Ma-lacca and Singapore Straits, which is recognized as the most crowded sea-lane and a maritime traffic zone and could potentially experience a sea-based leakage of plastic from ship lines. Seven sites with different orientations and nearby activity were studied around Bintan and were classified as touristic (S1-S4), industrial (S5), and domestic (S6) harbors and/or as for industrial activities. F...