5 Most Expensive Cities Around the World to Rent an Apartment

4. San Francisco, California, US

Cost of Rent Index Score: 91.4

The jump between the rent index of San Diego and San Francisco shows all that you need to know about the high rental costs in the city. It is a cultural and financial hub in the U.S., and is the center of the American technology industry. San Francisco has a population of close to a million, also making it one of the largest cities in America. San Francisco is also a global city in the U.S.,  but it is also notorious for its high rents due to a housing problem that stems from laws surrounding building construction.