Background: Anxiety is an emotional condition characterized by fear, uneasiness, and worry over potentially dangerous situations, as well as a physiological state of awareness. Surgery is a severe procedure that is often accompanied by bleeding, discomfort, and the danger of morbidity or death. As a result, preoperative anxiety is frequent, and the reported prevalence of preoperative anxiety among patients undergoing various types of surgery ranges from 60 to 90%. The objectives of the study were to assess the anxiety level among patients undergoing surgery and to associate the anxiety level with selected demographic variables. Materials and methods: Descriptive research design was used for the study. The study population was patients who were undergoing surgery admitted to a tertiary care hospital. A purposive sampling technique was used to select 40 patients from the surgery ward. The demographic data were collected from the samples and Beck Anxiety Inventory Scale was administered to assess the anxiety level among patients undergoing surgery. Result: The result revealed that out of 40 samples, 26 (65%) had severe anxiety, 10 (25%) had moderate anxiety, and 4 (10%) had a low level of anxiety. It shows that majority of the adults had anxiety while undergoing surgery.