The Journal of the British Interplanetary Society (JBIS) is a technical scientific journal, first published in 1934. JBIS is concerned with space science and space technology. The journal is edited and published monthly in the United Kingdom by the British Interplanetary Society.

Although the journal maintains high standards of rigorous peer review, the same with other journals in astronautics, it stands out as a journal willing to allow measured speculation on topics deemed to be at the frontiers of our knowledge in science. The boldness of journal in this respect, marks it out as containing often speculative but visionary papers on the subject of astronautics.