Credit Suisse regularly publishes its annual wealth report comparing the wealth (net worth) of adults (as private individuals, i.e. not the wealth of the whole country divided by its population) in different countries.
It defines “wealth” as “financial assets (e.g. bank deposits) + non-financial assets (e.g. real estate) – debt” (if assets are less than debt, wealth can be negative). The map below shows estimates of the median wealth per adult by country, which is the middle value (50% own more, 50% own less), based on the 2017 report:
How do other major economies fare? The medians are (in 1000 USD): France 120, United Kingdom 103, Japan 124, United States 56, Germany 47, China 6.7, India 1.3.
It is worth noting that Credit Suisse marks the quality of data for most South and Central American countries as “poor”, so the estimates may be somewhat less accurate than the corresponding estimates for European countries (where the quality of data is mostly “good”).