Research data supporting Working Paper (WP) 20: Harry Smith, Carry van Lieshout, Piero Montebruno and Bob Bennett, (2019), Preparing Scottish census data in I-CeM for the British Business Census of Entrepreneurs (BBCE). Data set provides the cut-offs for each parish code in Scotland 1851-81 for a logit estimator, as described in WPs 9 and 9.2, and published for England and Wales in Ag. Hist. Rev. 2019, Montebruno et al. Continuous parishes are used (ComParID), as defined in the GIS by Roughley 2019.