The Topical Workshop on Electronics for Particle Physics (TWEPP-09) took place in Paris, France, from 21 to 25 September 2009. Fourteen invited and 131 contributed papers (63 oral and 68 poster) were presented in 10 plenary and 11 parallel sessions to an audience of approximately 240 participants. Twenty-six of these participants came from the United States and five from Japan, while the majority originated from Europe. Of all presented papers, 25% referred to the LHC project, 43% to the SLHC upgrade programme, and 32% to ILC and other experiments.