The global gravity model EGM2008 is evaluated in various regions of the country to assess if it is good enough for geodetic applications. The evaluation method involves comparison of geoidrnheights computed from the model with those computed at irregularly distributed GPS/levellingrnstations. For testing the model, a total of seven levelled benchmarks available in Uganda whichrnbelong to the New Khartoum datum are used. The spatial positions of these benchmarks wererndetermined at mm accuracy, with respect to ITRF2008. The agreement between the EGM2008rngeoid and the geoid undulation derived from GPS/levelling over the seven irregularly distributedrnbenchmark points has a standard deviation of 0.255m, with a mean of -0.859m. The datum offsetrnmay be due the choice of Wo (potential of the geoid) and Uo (potential on the surface of thernellipsoid); using GRS80 for the gravitational reference system and WGS84 for the geometricalrnreference system; some possibly different tidal conventions; but, by using the same method ofrnanalysis for Ethiopia and Uganda, these absolute offset effects are eliminated when comparing therntwo so that the computed difference [0.118 m] in datum offset for the two states does tell usrnsomething about the differences in levelling datums. The standard deviation of 26 cm suggests thatrnsparser, irregularly-distributed and inhomogenous gravity data for Uganda was used in therndevelopment of EGM2008 not ruling out errors in levelling since there is barely any documentationrnpertaining the accuracy of results obtained regarding the levelling network in Uganda.