Ionospheric Total Electron Content (TEC) is the most important parameter of ionosphere which varies with spatially and temporally such as longitudinal, latitudinal, altitudinal, solar and geo- magnetic activities. In this thesis, we have analysed the spatio - temporal variation of ionospheric Total Electron Content (TEC) data obtained from the GPS-TEC over the low latitudinal East Africa regions for the period of 2016. Our result showed that the diurnal variation of vTEC val- ues were maximum during the daytime occurred from 10:00 UT to 15:00 UT while its peak values occurred around 12:00 UT and minimum during pre-dawn and after sunset for all stations. The day to day variation is also significant at all stations, particularly its maximum values of vTEC were occurred during day time and minimum during night time. The seasonal variation of iono- spheric vTEC maximum during the Equinox months followed by the winter months (December solstice) and minimum during the summer months (June solstice). The variation of vTEC during geomagnetic storm of the May 2016 has also been investigated. Geomagnetic storm doesn’t only affect the magnitude of vTEC but it affect the pattern of vTEC.