This is a list of Liberian counties by Human Development Index as of 2021. [1]
| Rank | County | HDI (2021) |
|---|---|---|
| Low human development | ||
| 1 |  Montserrado |  0.545 |
| – |  Liberia | 0.481 |
| 2 |  Margibi | 0.474 |
 Nimba | ||
| 4 |  Maryland | 0.465 |
| 5 |  Grand Gedeh | 0.462 |
| 6 |  River Gee | 0.455 |
| 7 |  Sinoe | 0.452 |
| 8 |  Bomi | 0.443 |
| 9 |  Bong | 0.434 |
| 10 |  Rivercess | 0.430 |
| 11 |  Grand Kru | 0.427 |
| 12 |  Lofa | 0.425 |
| 13 |  Grand Bassa | 0.420 |
| 14 |  Grand Cape Mount | 0.406 |
| 15 |  Gbarpolu |  0.392 |
A developed country, or high-income country, is a sovereign state that has a high quality of life, developed economy, and advanced technological infrastructure relative to other less industrialized nations. Most commonly, the criteria for evaluating the degree of economic development are the gross domestic product (GDP), gross national product (GNP), the per capita income, level of industrialization, amount of widespread infrastructure and general standard of living. Which criteria are to be used and which countries can be classified as being developed are subjects of debate. Different definitions of developed countries are provided by the International Monetary Fund and the World Bank; moreover, HDI ranking is used to reflect the composite index of life expectancy, education, and income per capita. Another commonly used measure of a developed country is the threshold of GDP (PPP) per capita of at least US$22,000. In 2023, 40 countries fit all four criteria, while an additional 15 countries fit three out of four.
The Human Development Index (HDI) is a statistical composite index of life expectancy, education, and per capita income indicators, which is used to rank countries into four tiers of human development. A country scores a higher level of HDI when the lifespan is higher, the education level is higher, and the gross national income GNI (PPP) per capita is higher. It was developed by Pakistani economist Mahbub ul-Haq and was further used to measure a country's development by the United Nations Development Programme (UNDP)'s Human Development Report Office.
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