Census-Based Rankings Put Santa Clara and Maricopa at Top of California and Arizona County Incomes

Overview

• Stacker compiled county-by-county rankings for California and Arizona using the U.S. Census Bureau's 2024 five-year real median household income estimates published in mid-July.
• Santa Clara County tops the California list with a median household income of $164,281 and 68.6% of households earning more than $100,000.
• Maricopa County leads Arizona with a median household income of $89,300 and 44.4% of households earning more than $100,000.
• Each county entry reports within-county distribution markers, showing the share of households earning over $100,000 and under $25,000, and the lists rely on five-year estimates that can reflect smaller-sample variation in less-populous counties.
• The national picture shows a 2024 real median household income of $83,730 that is statistically unchanged from 2023, and the data underline how proximity to high-paying industries and government jobs concentrates wealth and can drive local housing and cost-of-living pressures for residents.