The 2001-2011 Temporal Output Area Classification (Temporal OAC or TOAC) is a geodemographic classification for the 2011 Output Areas in England.

A geodemographic classification provides a set of categorical summaries of the built and socio-economic characteristics of small geographic areas. Many such classifications, such as that developed in this paper, are created entirely from data extracted from a single decennial census of population. Such classifications are often criticised as becoming less useful over time because of the changing composition of small geographic areas.

TOAC is a result of a project that utilises an innovative methodology that classifies both 2001 and 2011 census data inputs utilising a unified geography and set of attributes to create a classification that spans both census periods. Using this classification, it is possible to examine the temporal stability of the clusters and whether other secondary data sources and internal measures might usefully indicate local uncertainties in such a classification during an intercensal period.