In May 2023, surveys were conducted in the barley growing areas of the Central district, Baykan, Kurtalan, Pervari, Şirvan, Eruh, and Tillo districts of Siirt province, Türkiye. Leaf diseases occurring in barley and wild barley (Hordeum spontaneum, Hordeum bulbosum) plants were determined. On barley plants, net and spot forms of net blotch disease caused by Pyrenophora teres f. teres, and Pyrenophora teres f. maculata, powdery mildew caused by Blumeria graminis f. sp. hordei, scald caused by Rhynchosporium commune, barley stripe caused by Pyrenophora graminea and spot blotch disease caused by Cochliobolus sativus were detected. On wild barley plants, the net form of net blotch disease caused by Pyrenophora teres f. teres, spot form of net blotch disease caused by Pyrenophora teres f. maculata, powdery mildew caused by Blumeria graminis f. sp. hordei, scald caused by Rhynchosporium commune, barley stripe caused by Pyrenophora graminea and brown rust disease caused by Puccinia hordei were found.