espanolEste trabajo presenta un analisis del nivel de concentracion para 60 actividades industriales en Colombia, haciendo una diferenciacion de escala de concentracion que se divide entre alta, moderada y baja. El mismo analisis se extendio a nivel departamental y, finalmente, para determinar la estabilidad del indice de concentracion a largo plazo se utilizo la prueba estadistica F. La base de datos utilizada proviene de la Encuesta Anual Manufacturera (EAM) desagregada a tres digitos. El grado de concentracion se reviso a traves de las dimensiones como el numero de personas ocupadas, el numero de establecimientos y el valor agregado dentro de la industria. Los resultados muestran que el 73% de la industria manufacturera en Colombia exhibe altos niveles de concentracion y el 27% restante se distribuye en porciones iguales, donde el 13,5% presenta niveles de concentracion moderada y el 13.5% concentracion baja. El analisis por departamento muestra que el 45% de ellos posee una alta concentracion, 25% moderada y 30% baja. La ciudad de Bogota, por su parte, reflejo el menor nivel de concentracion; mientras que el departamento del Cesar presento el maximo nivel de concentracion. Al llevar a cabo la prueba estadistica F, se concluye que las cuotas y posiciones relativas de los establecimientos en el mercado no variaron significativamente entre 2001 y 2010. Esta conclusion fue valida tanto a nivel de actividad industrial como a nivel geografico. Lo anterior sugiere la presencia de un alto grado de estabilidad del nivel de concentracion de la industria manufacturera en Colombia. EnglishThis paper presents the results of the extent of concentration for 60 industrial activities in Colombia; each activity was categorized according to the level of concentration exhibited: high, moderate and low. The same analysis was made computing the concentration index for 19 departments plus Bogota, which gave broader picture of the industrial concentration level in Colombia. Finally, the statistical F test was used to determine the relative stability of the concentration index. The data for this research comes from the Colombian Manufacturing Annual Survey (EAM by its acronym in Spanish), disaggregated up to three digits and addressed by three dimensions of analysis: i) the number of employees, ii) the number of firms, and iii) the added value. The results show that 73% of the whole manufacturing industry in the country exhibits high levels of concentration, while the remaining 27% is distributed in equal proportions between moderate and low levels of concentration. The analysis by department shows that 45% of them have a high industrial concentration level, 25% moderate and 30% low. While the city of Bogota showed the lowest level of concentration, the department of Cesar showed the highest level. According to the F test results, the concentration level found in 2001 was statistically the same in 2010 for almost all the activities analyzed. The same evidence was found when the index was computed by departments and the city of Bogota. These results indicate that the extent of concentration in the Colombian manufacturing industry has remained practically static between 2001 and 2010.