Supporting data for the article titled "Electrostatically-directed self-assembly of ultra-thin supramolecular polymer microcapsules". The article was accepted for publication on 28th April 2015 in the journal "Advanced Functional Materials". Electronic supporting Information is available from the publisher (Wiley). This data provides the original confocal fluorescence micrographs and the corresponding spreadsheets used to generate the line-graphs included in Figures 2 and 4 in the manuscript, and S5 in the Electronic supporting Information. The processed spreadsheet, hyperspectral cube dataset and optical micrographs used in 2-dimensional thickness mapping of the microcapsule, as reported in Figure 3 of the manuscript, is also included. NMR and IR spectra are in the "synthesis and characterisation" folder.