The Republic of Stan Marsh is a massive, socially progressive nation, ruled by Stan Marsh with a fair hand, and renowned for its free-roaming dinosaurs, rampant corporate plagiarism, and spontaneously combusting cars. The hard-nosed, hard-working, democratic, devout population of 3.512 billion Stan Marshians live in a state of perpetual fear, as a complete breakdown of social order has led to the rise of order through biker gangs.

There is no government in the normal sense of the word; however, a small group of community-minded, liberal, pro-business, outspoken individuals keep a keen eye out for any attempt to organize such a thing, and ruthlessly crush it. It meets to discuss matters of state in the capital city of South Park. Income tax is unheard of.

The Stan Marshian economy, worth 128 trillion dollars a year, is driven almost entirely by the private sector, which is quite specialized and led by the Pizza Delivery industry, with significant contributions from Soda Sales, Uranium Mining, and Woodchip Exports. Average income is 36,625 dollars, but there is a significant disparity between incomes, with the richest 10% of citizens earning 118,751 per year while the poor average 8,523, a ratio of 13.9 to 1.

Fur coats have become the latest fashion trend, appendix transplant figures have recently doubled, citizens may cast their vote over the internet or phone, and the government has declined to declare any particular religion as its 'official' one. Crime, especially youth-related, is all-pervasive, probably because of the absence of a police force. Stan Marsh's national animal is the cow, which teeters on the brink of extinction due to widespread deforestation.

Stan Marsh is ranked 252,424^th in the world and 1^st in Town of South Park for Largest Cheese Export Sector, scoring -4.1 on the Mozzarella Productivity Index.