The purpose of this study was to develop a reliable and valid scale to measure acculturation of Iranian immigrants in Canada. The 20-item Iranian Acculturation Scale showed Cronbach alpha of .83. Item-total correlations ranged from .25 to .65. Four factors were extracted, based on responses from 119 Iranian immigrants (43 men and 76 women) living in Toronto. The scale tapped different acculturation dimensions, cultural identity, language, family-related attitude and family-related values. The longer these Iranian immigrants had lived in Canada, and the earlier the age of moving to Canada the better acculturation suggested by their scores.