To compute a city’s hinterworld it is necessary to specify its external relations with other cities. For this exercise I deal with just the top 123 cities in terms of global network connectivity. To ﬁnd a satisfactory measure of hinterworlds takes two steps. I begin by describing an initial ‘absolute’ measure that is shown to have limited utility for comparing city hinterworlds. However, it forms the basis for a ‘relative’ measure that does turn out to be interesting in this respect and therefore is used for subsequent comparative hinterworld studies.