The First International Workshop on Requirements Patterns (RePa'11) was held in conjunction with the 19th IEEE International Requirements Engineering Conference in Trento, Italy. The workshop was attended by 12 participants from the UK, Germany, Sweden, Switzerland, Canada, Russia, Brazil, and China. The workshop program included discussions of five pattern papers, a presentation of a technical paper, a pattern exercise, and a general discussion session on the state of the art and future directions.