For many Americans, Social Security is the main source of retirement income. In fact, according to research by SmartAsset, the average retiree in the U.S. received 41.6% of his or her total income of $50,780 from Social Security in 2021, slightly up from 41.50% in its 2022 study.

Depending on where you live, that percentage could be as much as 50% of overall retirement income, according to SmartAsset.

SmartAsset’s sixth edition of a study on the cities where retirees rely most on Social Security found that seniors in Midwestern cities continue to be more reliant on Social Security, while California seniors have other sources of income.

The financial technology company examined data for social security income as a percentage of overall retirement income in the 100 cities with the largest population of residents 65 and older. Specifically, it looked at average retirement income for senior households and average Social Security income for senior households, using the U.S. Census Bureau’s 2021 one-year American Community Survey.

Here is SmartAsset’s list of top 15 cities where retirees rely most on Social Security:

15. Pittsburgh

Retirees in Pittsburgh have an average annual income of $41,538, of which just under half (45.23%) comes from Social Security.