This paper presents vulnerability maps for reinforced concrete moment frames (RCMFs) in Mexico City's Metropolitan Area for a M s =8.1 earthquake scenario assessing peak nonlinear dynamic responses using the concept of displacement ductility demand spectra (DDDS). The considered earthquake scenario is an equivalent scenario to the M s =8.1 September 19, 1985 Michoacán Earthquake that severely affected Mexico City. These vulnerability maps were compared with the geographic area of severe structural damage and collapses mapped during the 1985 earthquake. Based on the results of this study, it is believed that this procedure can be used with confidence to locate zones of high demands for different structural systems and earthquake scenarios, being therefore potentially useful for urban planning of cities located in zones of high seismic risk.