Census information for Sapley can normally be found under Hartford parish.
A full transcription of the 1891 Census of the Huntingdon Registration District (RG12/1237)
in which Sapley was enumerated, and which took place on 5th April 1891, is available as fiche
C9 from the
In 1831 the recorded population of Sapley was 8; in 1851 this had grown to 17. Population records between 1877 and 1935 were included in Hartford. Since 1935 both Hartford and Sapley have been part of the Borough of Huntingdon, and the population statistics treated accordingly.