This is the peer reviewed version of the following article: Orlowski, N., Pratt, D. L., and McDonnell, J. J. (2016) Intercomparison of soil pore water extraction methods for stable isotope analysis. Hydrol. Process., 30: 3434–3449., which has been published in final form at DOI: 10.1002/hyp.10870. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.