Background: Hypertension is a leading modifiable risk factor for cardiovascular morbidity and mortality worldwide and is often termed the “silent killer” due to its asymptomatic onset. Awareness of hypertension and its lifestyle risk factors is a cornerstone of prevention, yet data from geographically unique high-altitude districts such as Shimla, Himachal Pradesh, remain limited. This study assessed community awareness, knowledge gaps, and misconceptions regarding hypertension, alongside socio-demographic determinants influencing awareness levels. Material and Methods: A descriptive, cross-sectional study was conducted among adults (≥18 years) residing in rural and urban areas of Shimla district between Feb 2025 and May 2025. A validated, bilingual (English/Hindi) questionnaire comprising socio-demographic details and 20 multiple-choice awareness questions was disseminated via Google Forms using convenience sampling. The survey link was circulated through social media, email, and local health networks. Knowledge scores (0–20) were categorized as very good (16–20), good (12–15), fair (8–11), and poor (0–7). Data were analyzed using SPSS version 25, applying descriptive statistics and Chi-square tests to examine associations between knowledge levels and socio-demographic variables, with p<0.05 considered significant. Results: A total of 400 participants completed the survey, with a mean age distribution skewed towards older adults (≥50 years: 32.5%). Males comprised 52.5% of respondents, and 60.0% resided in rural areas. Overall, 25.5% demonstrated very good knowledge, 39.5% good, 23.0% fair, and 12.0% poor. Highest awareness was recorded for identifying a sphygmomanometer as a BP measuring device (79.5%) and recognizing high salt intake as a modifiable risk factor (75.0%). Notable gaps included awareness of urban–rural prevalence differences (57.3%) and recommended screening frequency (61.8%). Knowledge was significantly associated with age (p=0.049), education (p<0.001), occupation (p=0.010), income (p<0.001), and residence (p=0.012), but not with gender or marital status. Conclusion: While a majority of adults in Shimla district exhibited good to very good awareness of hypertension and its modifiable risk factors, critical deficits persist in symptom recognition and preventive screening knowledge, particularly among rural, less-educated, and lower-income groups. Targeted, culturally relevant educational interventions and integration of routine blood pressure screening into community health activities are essential to bridge awareness gaps and mitigate the long-term cardiovascular disease burden in this high-altitude Himalayan setting.