Tourism in small historic cities, in addition to creating economic opportunities, is accompanied by social–cultural and environmental impacts, and how these impacts are evaluated by host communities is important for destination management. Noushabad, with its historic heritage and location in a dry environment, provides an appropriate context for examining this issue. This study aimed to analyze residents’ perceptions of tourism impacts in Noushabad across three dimensions: economic, socio-cultural, and environmental. In terms of purpose, the study is applied; in terms of design, it is descriptive–analytical with a quantitative approach. Data were collected using a structured questionnaire from 300 residents of Noushabad selected through simple random sampling. The data were analyzed using one-sample t-tests, Friedman test, Pearson’s correlation coefficient, and an independent-samples t-test. The results showed that residents’ perceptions of tourism impacts were multidimensional and heterogeneous. The environmental dimension received the highest rank, followed by the socio-cultural and economic dimensions, and the differences among the three dimensions were statistically significant. In the economic dimension, increases in local income, investment in urban improvement, and improvement of public amenities were rated above the midpoint, whereas employment opportunities and the creation of new local businesses did not differ significantly from the midpoint, and the perceived improvement in urban infrastructure was below the midpoint. In the socio-cultural dimension, the preservation and restoration of historical and cultural heritage was favorably evaluated, whereas the strengthening of local culture and identity was below the midpoint. In the environmental dimension, the overall evaluation was more favorable, and the negatively worded items indicated lower perceptions of adverse impacts. Positive and significant relationships were also found among all three dimensions. The findings underscore the need for multidimensional tourism management, with emphasis on strengthening local economic benefits, reinforcing the link between tourism and local culture, and monitoring environmental pressures.