The article analyzes the problems of socio-cultural sphere in the new economy, as well as the impact of socio-cultural sphere on the brand of St. Petersburg, paper also discusses possibility of evaluation of changes in brand strength due to socio-cultural impact. The proposed method of estimation of the strength of the brand is universal enough, but due to a pronounced specificity of various segments of the public sector it requires specifying when evaluating consumer interest in services for various types of organizations. In this paper, brand evaluation can not be based on the financial performance of organizations; we are not interested on the characteristics of brand equity, but on indicators of consumer preferences and the associated strength of the brand on the market. The proposed method can be adapted to different segments of the public sector (and their impact on brand site) that require adaptation indicators of demand and availability of the services of these organizations. It requires considering n