This thesis is aimed to study diurnal, monthly, seasonal and spatial variation of ionospheric TEC obtained from GPS satellite in the years of 2014 and 2015. TEC data measured by dualfrequency signals of the Global Position System (GPS) in two Ethiopian low latitude stations, such as Bahir Dar (BDAR) with geographic latitude (11:6 0 N) and Longitude (37:35 E) and Arba Minch (ARMI) with geographic latitude (6:06 0 N) and Longitude(37:57 E) during the years 2014 and 2015. The processed and archived data taken from GPS receiver has been imported in to a MATLAB code which gave us the results of the value of TEC. The results show that the diurnal variation TEC minimum between 23:00 UT to 02:00 UT or 17:00 h ELT to 20:00 h ELT; maximum at about 12:00 to 14:00 UT or 06:00 h ELT to 08:00 h ELT. As regards to monthly variations of ionospheric TEC, results of GPS satellite shows that highest mean TEC value is recorded on March and July recorded the least peak TEC value. The seasonal variation of TEC maximizes during the equinox months followed by winter months especially July. The latitudinal variation of ionospheric TEC at Bahir Dar is higher than Arba Minch. In addition to this we have also seen correlations between geomagnetic activity and TEC. 0 Key words: Ionospheric Total Electron Content(TEC), Low Latitude or Equatorial Stations, Diurnal, Monthly, Seasonal, Variation. 0