AbstractThis article describes the aims, methodology and contents of the Eighteenth‐Century English Grammars database online (ECEG). Starting with the definition of the term ‘English grammar’ in ECEG, which frames and sets the limits of what has been included in and excluded from the database, we then offer a detailed discussion of its design, compilation and annotation procedures. While describing the data coded in twenty‐one individual relational fields, the article also hints at the potential avenues that the classification in ECEG opens up for academic research and educational purposes.