Introduccion y Objetivo: Los Actinomyces se asocian a diversas patologias bucodentales; su presencia varia con la higiene oral, el flujo salival y los movimientos de los musculos periorales; aspectos potencialmente comprometidos en ancianos. El objetivo de este trabajo fue identificar la presencia los Actinomyces sp en la placa dentobacteriana y determinar la asociacion de su presencia con la edad. Materiales y Metodos: Se realizo un estudio observacional analitico de corte transversal. La muestra la integraron 100 personas que cumplieron con los criterios establecidos. Se recolectaron variables sociodemograficas, condicion sistemica; presencia y cantidad de Actinomyces sp y Actinomyces viscosus; a nivel oral: Condicion periodontal (IPCNT), caries radicular (RCI) e higiene oral (ICP). En el analisis univariado se calcularon las medidas de resumen segun la naturaleza de las variables; el bivariado relaciono presencia de Actinomyces sp con cada variable en estudio, mediante test de Chi cuadrado o test exacto de Fisher para variables cualitativas y prueba t de student y U de Mann Whitney para las cuantitativas. Resultados: En el 13.9%(14) de los pacientes se aislo Actinomyces sp, y la especie Actinomyces viscosus en el 4%(4) de los sujetos. Los Actinomyces sp se observaron con mayor frecuencia en personas comprometidas sistemicamente (92.9%) y entre los sujetos con una higiene dental regular (78.6%). Conclusion: La presencia de Actinomyces en la poblacion evaluada no parece asociarse con la edad; sin embargo, los sujetos en los que se aislo este microorganismo podrian tener mayor riesgo de desarrollar abscesos cervico-faciales o patologia a nivel respiratorieo o gastrointestinal. ABSTRACT Introduction and Objective: Actinomyces are associated to several oral diseases; their levels vary with oral hygiene, salivary flow and movements of perioral muscles; these tissues could be affected in the elderly. The objective of this study was to identify the presence of Actinomyces sp in bacterial oral plaque and to determine its association with age. Materials and Methods: An analytical observational study was carried out with a sample consistent of one- hundred individuals who complied with established criteria. Social-demographics, systemic condition, oral presence and amount of Actinomyces sp and Actinomyces viscosus, periodontal disease (IPCNT), root decay (RCI) and oral hygiene (ICP) variables were evaluated. In the univariate analysis, calculation of summary measures according to the nature of the variables was done. Actinomyces sp presence was related to each variable in study, by Chi square or Fisher Exact test for qualitative variables, and t-test and U Mann Whitney test for quantitative variables. Results: In 13.9% (14) of patients, Actinomyces sp was isolated, and Actinomyces viscosus in 4% (4) of subjects. Actinomyces sp were observed most frequently in individuals with systemic compromise (92.9%), and in subjects with deficient dental hygiene (78.6%). Conclusion: Presence of Actinomyces in the evaluated population does not seem to be associated with age. Nevertheless, subjects in which the microorganism was isolated could be at a major risk of developing cervico-facial abscesses or remote pathologies at a respiratory or gastrointestinal level.