The 8th International Conference on Ad-Hoc Networks and Wireless (ADHOC-NOW 2009) was held September 22–25, 2009 in Murcia, Spain. Since ADHOCNOW started as a workshop in 2002, it has become a well-established and well-known international conference dedicated to wireless and mobile c- puting. During the last few years it has been held in Toronto, Canada (2002), Montreal, Canada (2003), Vancouver, Canada (2004), Cancun, Mexico (2005), Ottawa, Canada (2006), Morelia, Mexico (2007) and Sophia Antipolis, France (2008). The conference serves as a forum for interesting discussions on ongoing research and new contributions addressing both experimental and theoretical research in the area of ad hoc networks, mesh networks, sensor networks and vehicular networks. In 2009, we recived 92 submissions from 28 different countries around the globe: Algeria, Australia, Brazil, Canada, China, Egypt, Finland, France, G- many, Greece, India, Iran, Ireland, Italy, Japan, Korea, Luxembourg, Malaysia, Mexico, Norway, Poland, Portugal, Serbia, South Africa, Spain, Tunisia, UK and USA. Of the submitted papers, we selected 24 full papers and 10 short papers for publication in the proceedings and presentation in the conference.