Income Inequality

County’s Income Inequality is Low Compared to Peers

Income inequality, or the gap between the rich and the poor, has been increasing in the United States since the 1980s and is higher than most industrialized countries. High income inequality is associated with poorer public health, reduced socioeconomic mobility, and reduced feelings of well-being among those at the low end of the income distribution.1 This indicator measures the level of income inequality among households in San Bernardino County using the Gini Index.

Income Inequality

Gini Index Scale

Gini Index results range between zero (0) and one (1). A value of zero indicates complete equality, where all households have equal income. A value of one indicates complete inequality, where only one household has any income.

Lowest and Highest Gini Index Scores Among Cities in San Bernardino County, 2017

Lowest Income InequalityHighest Income Inequality
CityGini Index ScoreCityGini Index Score
Grand Terrace0.38Apple Valley0.47
Chino Hills0.39Barstow0.49
Fontana0.39Loma Linda0.5

Source: U.S. Census Bureau, American Community Survey, 5-Year Estimates (Table B19083)

How is San Bernardino County Doing?

There is less income inequality in San Bernardino County than the state and nation:
• In 2017, San Bernardino County’s Gini Index score was 0.44 compared to 0.49 in California and 0.48 nationwide.
• Among all California counties, San Bernardino County has less income inequality than 48 of the state’s 58 counties.
• In comparison to selected peer and neighboring counties, San Bernardino County has the least income inequality.
• Within San Bernardino County, Grand Terrace is the city with the lowest income inequality (0.38) and Loma Linda is the city with the greatest income inequality (0.50).

Gini Index of Income Inequality

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Source: U.S. Census Bureau, American Community Survey, 5-Year Estimates (Table B19083)

1Reeves R. (2018). Restoring middle-class incomes: redistribution won’t do. Brookings Institute ( Organization for Economic Cooperation and Development ( Pickett KE, Wilkinson, RG. (2015). Income inequality and health: A causal review. Social Science & Medicine. Vol.128 Oishi S, Kushlev K, et. al. (2018). Progressive Taxation, Income Inequality, and Happiness. American Psychologist, Vol.73(2) Russell Sage Foundation. (2016). What we know about income inequality and social mobility in the United States (