Objective: to develop suitable tools for dementia screening in older peoples. Materials and methods: The samples were people aged 60 years and over, be able to read and write, no hearing problems, agree to participate inthe research project, and living in communities in Chachoengsao and Nakhon Ratchasima provinces. Data collection between January - June 2018. The research instruments used by the health volunteers included (1) 14 questions, Mini-Cog (2 questions), AMT, IQCODE-Modified (8 questions) and Mini-Cog (S. Borson) set 1 and Mini. -Cog (S.Borson) set 2 screening by public health volunteers (2) MMSE Thai-2002 and MoCA screening by health personnel and (3) Clinical diagnosis, DSM-V by physicians. The data analysis used Pearson's correlation, cut-off point, Sensitivity, Specificity, Reliability, Validity. Accredited by the Human Ethics Committee of the Institute of Geriatric Medicine, Department of Medical Services, Ministry of Public Health, Thailand, No.4/2561. Results show that 765 older people were screened for dementia in the community. The diagnosis from the physicians shows 5.5% having dementia, 85.9% had mild cognitive impairment (MCI), and 8.6% had no memory problems compared to the gold standard, which were (1) a doctor's diagnosis (DMS-V) and (2) the results of the evaluation using the MMSE-Thai 2002 and MoCA assessment tools. The instrument screening by health volunteers with 14 questions had the highest Reliability of 0.928. The Mini cog (2 questions) had the lowest Reliability of 0.340, while the IQCODE (8 questions) had the highest sensitivity of 0.579. The instrument screening by health personnel with the Mini-Cog (S.Borson) set 2 had the highest sensitivity of 0.968. In conclusion, the dementia screening tool for public health volunteers was 14 questions, Mini cog (2 questions), and IQCODE (8 questions). The dementia screening tool for health personnel is the AMT Brain Test, the Mini-Cog Assessment (S. Borson) Series 1, and the Mini-Cog Assessment (S.Borson) Series 2. All screening tools are used to screen older people with memory problems and integrate them with clinical symptom diagnosed by physicians. The instrument has an acceptable sensitivity, specificity, positive forecast, and negative forecast. Therefore, the selection of screening tools should be considered appropriate for the community. Professional users and community health volunteers are required to undergo a training for practical skills before using the tools

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