Recently a view has emerged in the literature that low inflation may also be influenced, among other variables, by demography. However, there is little empirical evidence for this hypothesis. The motivation of this paper is to assess whether inflation is linked to the population age structure, and especially whether an increased old-age dependency ratio is correlated with a lower inflation rate. To check this hypothesis, a panel data model is used. The model is estimated for 32 OECD member economies over the period from 1971 to 2015. We regress the changes in consumer price inflation on a set of macroeconomic variables. The results of the estimations suggest that there is a relation between demography and low-frequency inflation. A larger old-age dependency ratio is indeed correlated with lower inflation. Therefore, ongoing population ageing may exert downward pressure on inflation. This confirms some of the previous empirical findings that ageing is deflationary when related to increased life expectancy.