Microtremor measurements have been carried out in Delhi with an ultimate aim of seismic hazard microzonation for ground-shaking site effects. The parameters required are resonance frequency and amplification of ground motion at that frequency. Resonance frequencies and lower bound estimates of the level of amplification of the horizontal motion with respect to the vertical motion (H/V) at various sites in and around Delhi were estimated. The data show variation in these parameters from one area to another. This could be due to variations in soil thickness and/or variations in the soil type. Our preliminary investigation shows that amplification of ground motion is very low on the ridge compared to that at soft-soil sites. The resonance frequency is high at sites close to the ridge and also to its west, compared to that at sites close to river Yamuna. Amplification of ground motion is more at sites close to the river compared to that at the other sites investigated so far. As more data of this type become available, microzonation of Delhi would become possible.