Tehran is one of the densely populated metropolises located
in earthquake-prone regions. Tehran, the population of which
surpasses 8 million people, is the most populated area in
Iran. There are historical evidences confirming that
catastrophic earthquakes have destroyed the city in past
years. In the present paper, our study covers all parts of
Tehran because there is the potential of significant
earthquake damage and loss for the entire city. In other
words, the development of high-rise building construction in
the northern part, the high density of population in the
southern area including old masonry buildings, and the
existence of important structures in central regions, prevent
us from omitting any particular part of the city from damage
assessment process. We have used two sets of last available
formal data published in 1996 and 2006. To consider the
influence of soil conditions, Tehran has been divided into
1246 sub regions; however, in our study the results have
been presented using municipality regions and in cumulative
manner. Since there is no acceptable statistical data
involving estimation of non-structural damage, only
structural damages have been assessed. The open source
software SELENA is applied to perform probabilistic loss
estimates. Due to the lack of studies providing required
information from structural point of view in our country, and
the existence of similarity between structural codes of Iran
and that of United States, HAZUS-MH (Hazard Us – Multi
Hazard Loss) structures coefficients are used. According to
the results, from 1996 to 2006, the mean damage ratio and
number of casualties have been reduced, while the economic
loss has been increased