For the territory of the Novosibirsk region holds the formation and study of the three options of local digital geoid models with a regular grid of latitude and longitude in WGS-84 coordinate system. Formation of local models was carried out using the software «Trimble Business Center» (ON TBC) and a global model EGM2008-2,5'. To compute the geoid height at arbitrary points used method of weighted averages of the six units at the two closest to the defined point parallels the regular grid. As a working model of the geoid selected local increments 0,012 5º (~ 1,4 km). It is shown that the accuracy of the working model of the geoid and the geoid height calculation method is almost equivalent to the weighted average values of precision of the original model EGM2008-2,5'. Average square error deviations from the reference geoid height values for 160 test points, evenly spaced around the territory of the Novosibirsk region amounted to ±2mm.