Dataset corresponding to the underlying numerical and experimental data of the research article "Local response and emerging nonlinear elastic length scale in biopolymer matrices". This repository contains four categories of data, each contained in a folder: - Fiber Network Simulations - Finite Elements Simulations - Optical Tweezer Experiments - Traction Force Microscopy In each folder, a README.txt document provides a detailed description of the content. We would like to acknowledge the support from the NIH (1R01GM140108), MathWorks, and the Jeptha H. and Emily V. Wade Award at the Massachusetts Institute of Technology. H.Y. acknowledges the MathWorks Mechanical Engineering Fellowship. M.G. acknowledges the Sloan Research Fellowship. This project received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement no. 891217 and the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation), Project-ID 201269156 - SFB 1032 (Project B12) (E.B. and C.P.B.). P.R. is supported by France 2030, the French National Research Agency (ANR-16-CONV-0001), and the Excellence Initiative of Aix- Marseille University—A*MIDEX.