Latvia is involved in international integration processes and therefore the question about evaluation and promotion of competitiveness of Latvia and its regions becomes more topical. After analyses of the existing methods of evaluation of competitiveness it is possible to conclude, that the best way how to characterize development and competitiveness of different territories is use of synthetic or generalized indicator – index of competitiveness. Repose on the author’s research about the essence of regional competitiveness and the factors that have an effect on it, the model of regional competitiveness factors was worked out, and regional competitiveness factors and indicators were selected and analyzed. Repose on the author’s function of Index of regional competitiveness (RKI) the RKI for Latvia planning regions was calculated. In the year 2007 the most competitive was Riga planning region. Kurzeme region took the 4th place after regions Zemgale and Vidzeme. In the last place was Latgale planning region. The total level of Kurzeme region competitiveness, if it is compared with other planning regions of Latvia, is below the mean value. The most competitive area in Kurzeme region is availability of the natural resources, but, because the relative weight of this sphere is insignificant, this area do not have the notable effect on total RKI. And, in the areas, which relative weight are higher (innovations and research, economics and production) competitiveness of Kurzeme region is low or very low.