Batik wastewater from small-scale industries contains high concentrations of organic matter, suspended solids, and persistent synthetic dyes that pose significant environmental risks if discharged without adequate treatment. This study designed and evaluated the performance of a continuous electrocoagulation–filtration (EC–F) system for treating real batik wastewater under field-representative conditions. The electrocoagulation reactor, constructed from PVC and HDPE, was equipped with ten iron plate electrodes (mild steel, 30 x 50 cm, total active anode area 7,500 cm2) arranged at inter-electrode distances of 2 and 4 cm, operated at current densities of 8–18 mA/cm2. A downstream multi-media filtration unit (silica sand, activated carbon, zeolite) served as a polishing stage. The system was operated at detention times of 50, 75, and 100 minutes. Under optimal conditions (2 cm spacing, 100 min, 18 mA/cm2), the integrated system achieved removal efficiencies of 95.4% for COD, 94.4% for BOD, 98.3% for TSS, and 99.0% for color, with an energy consumption of 3.1 kWh/m3 and an estimated operational cost of USD 0.64/m3. Two-way ANOVA confirmed that both electrode spacing and detention time significantly influenced pollutant removal (p < 0.001), with synergistic interaction effects for COD and TSS. The treated effluent complied with Indonesian Ministry of Environment Regulation No. 5/2014. These results demonstrate that the continuous EC–F system is a practical, scalable, and cost-effective decentralized treatment solution for small-scale batik industries.