This document discusses definitions of urban and rural areas. It explores some key differences such as size, functions, employment, density, and administration. Several countries' criteria for defining urban populations are presented based on factors like population size, employment levels, housing density. Defining towns and cities can vary between countries as there is no agreed international definition. Delineating urban areas can also differ depending on if one considers the core city, greater metropolitan area, or full region. Overall the document examines how urban and rural are defined and some challenges around classifying areas.