Coconut shell obtained from Chorbe in Jos, Plateau state, Nigeria was carbonized and char formed at a temperature of 655ºC. The char was ground and sieved into different sizes of 7, 14, 25 and -25mm. These sizes were activated using iron chloride solution and then treated with hydrochloric acid, sodium hydroxide and ammonia solution and dried in a furnace to a temperature of 750ºC to increase the pores in each of the sizes. The bulk densities of 7, 14, 25 and -25mm particle sizes were calculated and found to be 0.399, 0.587, 0.619 and 0.383g/cm3 in that order. While the corresponding values for the pore volume and porosity were obtained to be 248.07, 212.45, 204.80 and 247.73cm3 and 77.8, 74.9, 72.22 and 77.0% respectively. The percentage yield was also found to be 97.04, 65.80, 62.50 and 100.0% corresponding with particle sizes of 7, 14, 25 and -25mm. When proximate analysis was conducted on the four different particles sizes, the results of moisture content, volatile matter, ash content and fixed carbon were obtained to correspond with 14.84%, 22.4%,  34.25%, 15.8%: 22.14%, 22.4%, 29.4%, 57.72%:  0.8%, 1.4%, 1.3%, 7.8% and 62.21% 53.8%, 35.50%, 18.7% respectively. The overall result shows that the activated carbon with the four different particle sizes are good but best with 7 and -25mm particles sizes for water treatment, purification of gases, chemicals and other gaseous and liquid substances.