Dime dónde vives y te diré cuántos vecinos tienes –Población próxima en un radio de 1 km–

Many people would like to know how many neighbours they have around them, rather than how many inhabitants reside in their municipality. The answer to this question depends on the population density of the environment in which they live. In an urban centre, we tend to have many more neighbours than in a rural area, where human settlements are much smaller and the population is more dispersed. The statistics presented in this paper exploit the population distribution generated by Goerlich and Mollá (2025), who provide a population grid with a resolution of 100 m x 100 m cell size for all of Spain. This information is generated, using dasymetric methods, from the 2021 census grid of the Spanish National Institute of Statistics (INE) and data from the Spanish High Resolution Land Use Information System (SIOSEAR) for 2017. The result is an extremely granular population distribution, with more than 1.3 million cells. To determine how many neighbours we have nearby, we must first define what “neighbourhood” means. In this context, we are interested in a local neighbourhood aligned with the concept of 15-minute cities. Therefore, we consider a radius of 1 km, which represents an area of ap-proximately 3.14 km². This interaction space is relatively small and represents the population we could potentially engage with during a 15-minute walk.