West Kalimantan, majorly in density populated city-Pontianak- had not accurate statistic review about dementia and Alzheimer's. Huge nursing care attention to elderly was put on physically as degenerative process, while emotional and memory either cognitive function were not clearly assessed. The purpose of this study was to compare the effectiveness of Mini-Cog and MMSE as valid instrument identify ing and finding cognitive impairment in elderly which were leading to risk of de mentia as part of nursing assessment. This was a cross-sectional study with 108 literate elderly of both genders at the outpatient clinics and shelters of Geriatricts and nursing homes in city of Pontianak dan district of Kubu Raya, West Kalimantan. Sensitivity and specificity of vital measurements the Mini-Cog were compared with those of the Mini- Mental State Exam. Some factors-age, education, ethnicity, sleep duration were tested to find its correlation to cognitive impairment. All who met criteria for probable dementia based on informant interviews and with no revealed history of cognitive decline were included. Mini-Cog had the highest sensitivity and correctly classfied the greatest percentage (60.2%) of subjects in state posi tive cognitive impairment. Moreover, MMSE had 53.7% sensitivity to recognized probable and definite cognitive impairment. The MMSE score was 21.88±11.309 which was in higher risk. Administration time for the Mini-Cog was 3 minutes while MMSE had 7 minutes. The Mini-Cog instrument is the easier way and more effec tive in revealing the risk of dementia with minimal language interpretation require ment and less training to administer than MMSE. Elderly in upper 60 ages is higher risk group to undergo cognitive impairment-range from mild to moderate even se vere.