Question: civ 5 how much unhappiness from population?
Answer: No one City ever experiences Unhappiness alone - the Unhappiness it generates adds to the Global total. Each City you found will produce 3 Unhappiness, and +1 per unit of Population. So, founding a City will immediately produce 4 Unhappiness. As it grows, it will produce more and more Unhappiness, +1 per new Citizen.