BISP 2019 will be the 11th edition of the BISP workshops. The workshop will provide an opportunity to review, discuss and explore directions of development of Bayesian Inference in Stochastic Processes. Theoretical and applied contributions are both welcome. A non-exhaustive list of topics includes Markov processes, state-space models, spatial, empirical, birth-death and branching processes, queueing, population modelling, signal processes, stochastic differential equations. All sessions at this symposium will be plenary, with a mix of invited and contributed talks. There will be a poster session. The Symposium will take place at the Spanish Royal Academy of Sciences.