Generation of a smoothed design response spectra is essential for practical seismic design. This project presents the results of a statistical regression analysis on displacement and acceleration response spectra for near-field strong ground motion earthquake events. The research uses 79 near field horizontal strong earthquake ground motion records, which were carefully selected from a strong ground motion database by considering factors of the site soil condition, earthquake occurrence location, distance, and peak ground acceleration.The first objective of this research was to develop displacement seismic design spectra. Recently, development in displacement-based design methodologies has increased the need for reliable displacement design spectra, especially at long periods and different damping levels. Horizontal displacement spectra were developed for up to10-second periods, for damping levels of 0.5%, 2%, 5%, 10% and 20%.The second objective of this research was to examine near-field acceleration response spectra that are used for force-based seismic design. Currently the NBCC design spectrum is based on a limited number of earthquake records, and is satisfactory for far-field ground motions, corresponding to 5% damping and a short period range. Recognizing the important differences in structural response to near-field and far-field ground motion, this project extended the NBCC code spectrum to a 4-second period and to five different damping levels by using near-field ground motion records.