Background: Diabetes mellitus (DM) is an endocrine disorder marked by insufficient insulin production, disrupting glucose metabolism and regulation. DM is classified into type I (DM I) and type 2 (DM II). Glycated haemoglobin (Hba1c) is a marker for long-term blood glucose levels. Benign tongue abnormalities (BTAs) associated with (DM II) include the fissured tongue (FT), benign migratory glossitis (BMG), black hairy tongue (BHT), median rhomboid glossitis (MRG), and oral lichen planus (OLP). Aim of the work: This study aimed to determine the prevalence of BTAs among Libyan patients with controlled and uncontrolled DM II. The study also evaluates the potential correlation between BTA and factors such as age and gender. Materials and Method: This study included 426 Libyan patients with DM II. Disease duration and complications were obtained from the patient's medical records. Dependent binary variables (BTAs) and independent variables (age, gender, glycemic control in controlled and uncontrolled DM II) were calculated using IBM-SPSS 26. Result: 77.2% of the 426 patients with type 2 DM exhibited BTAs. FT 96.2% was the most common BTA, followed by MRG 2.1%. BMG 0.9%. BHT 0.6%, and LP 0.3%. 79.3% were glucose-uncontrolled diabetic patients (GUCDPs) and 20.7% were glucose-controlled diabetic patients (GCDPs). Conclusion: BTAs such as FT, MRG, BMG, BHT and LP were the most frequent conditions. BTA have a high prevalence rate in GUCDPs. BTAs are equally observed in both genders.