The self-regulation and self-efficacy beliefs have a major effect on English language learning achievement. This study examines if self-regulatory learning strategies and English self-efficacy beliefs significantly predicted learning achievement in learning English. 542 ninth grade students studying at ten different Vocational and Technical Anatolian High Schools formed the sample. Data were gathered through the Self-Regulatory Learning Strategies Scale, the English Self-Efficacy Beliefs Scale and the ninth grade English Achievement Test. Pearson Correlation Analysis was applied to describe the relation between English self-efficacy beliefs and self-regulatory learning strategies and the students' learning achievement in English. Simple and Multiple Linear Regression Analysis was used to analyze the predictive role of self-regulatory learning strategies and English self-efficacy beliefs on learning achievement in learning English. Self-regulatory learning strategies and English self-efficacy were determined to be significant predictive variables in explaining English achievement. But also students' English self-efficacy beliefs (R[superscript 2] = 0.24) was found to be a more powerful predictor of explaining English achievement than self-regulatory strategies (R[superscript 2] = 0.04). Therefore, studies can be carried out to improve students' self-efficacy perceptions and self-regulation skills towards English in order to increase their success in English lessons. This research can be replicated regionally or nationally with a wider study population.