Chart of Sochi divisions population (2010)

Sochi is administratively subdivided into four city districts: Tsentralny City District, Lazarevsky City District, Khostinsky City District, and Adlersky City District. Tsentralny City District, comprising the central portion of, is by far the smallest out of four in terms of the area, and the other three have comparable areas, with Lazarevsky City District being the biggest. In terms of the population, Tsentralny City District is approximately twice as big as each of the other three city districts.

Reference 1: Area (km2) and Population Census 2010.

Reference 2: Tsentralny, Lazarevsky, Khostinsky and Adlersky.

Source: http://en.wikipedia.org/wiki/Sochi