In 2018, the United States continued to host one of the largest populations of high-net-worth individuals globally, with a notable concentration of wealth in major financial and technology centers. Understanding the scale and profile of millionaire households in 2018 offers insight into economic inequality, investment trends, and regional prosperity during that period.
The summary table below outlines key dimensions of U.S. millionaire statistics in 2018, including estimated net-worth thresholds, household counts, concentration by state, and typical primary asset types.
| Metric | 2018 Estimate | Source | Notes |
|---|---|---|---|
| Households with net worth ≥ $1 million (excluding home equity) | 11.6 million | Spectrem & Capgemini World Wealth Report | Pure investable assets focus |
| Households with net worth ≥ $10 million | 1.4 million | Spectrem & Capgemini World Wealth Report | Ultra-high-net-worth segment |
| Top 3 states by millionaire households | California, Texas, New York | Bloomberg analysis & IRS location data | Financial, energy, and media hubs |
| Primary wealth driver for new millionaires | Equity compensation & business ownership | Spectrem & Capgemini surveys | 2018 bull market and IPO activity |
| Median net worth among millionaire households | ~$3.2 million | Capgemini & Spectrem data aggregates | Excludes home equity, varies by metro area |
Number of Millionaire Households in 2018
Researchers estimate that roughly 11.6 million U.S. households held at least $1 million in net worth, excluding the value of their primary residence in 2018. This figure represented a rise from previous years, supported by a prolonged bull market, robust corporate earnings, and strong performance in equities and real estate. Wealth managers and analysts used this metric to track progress among affluent households and to project future investment flows.
The concentration of millionaire households was highly uneven across states, with California, Texas, and New York leading the nation. These states combined housed close to a third of the country’s millionaire households, driven by major metropolitan centers, industry clusters, and favorable business environments. This concentration also underscored the geographic disparities in income, capital gains, and entrepreneurial opportunity across the United States.
Net Worth Thresholds and Definitions
$1 Million and $10 Million Thresholds
When analysts refer to "millionaires," they typically mean households with a net worth of $1 million or more, excluding the value of their primary home. A parallel category captures households with $10 million or more in net worth, often labeled as ultra-high-net-worth individuals. Tracking both thresholds reveals not only the breadth of affluence but also the depth of concentrated wealth at the very top.
Defining Net Worth Excluding Primary Residence
Excluding primary residence from net-worth calculations highlights financial flexibility, since home equity is less accessible for spending or investment compared to liquid or business assets. Under this methodology, millionaire status reflects investable assets such as retirement accounts, equities, bonds, and business interests. This approach is commonly used by wealth reports and has important implications for how policymakers and researchers measure economic security and opportunity.
Demographic and Geographic Distribution
State-Level Hotspots
Geographic clustering played a major role in 2018, with a handful of states accounting for a disproportionate share of millionaire households. Factors such as finance, technology, energy, and entertainment sector strength drove the clustering seen in states like California, Texas, and New York. Metro areas like San Francisco, Houston, and New York City served as engines for wealth creation and capital appreciation.
Urban-River Influence and Regional Prosperity
Within those states, major urban centers amplified the local millionaire count through high-paying jobs, venture capital access, and specialized services. Regional prosperity in 2018 was also supported by relatively strong wage growth and asset price increases. This urban-led growth pattern contributed to widening gaps in wealth and opportunity between metropolitan hubs and more rural regions.
Economic Drivers in 2018
Bull Market and Equity Compensation
In 2018, rising stock markets significantly boosted portfolio values, particularly for individuals holding substantial amounts of company stock or equity-based compensation. Executive pay packages, stock options, and performance shares frequently pushed executives and high-level employees into millionaire status. This dynamic linked household fortunes closely to corporate performance and public market valuations.
Business Ownership and Entrepreneurship
Beyond salaries and equity, business ownership remained a powerful pathway to millionaire status. Entrepreneurs who successfully scaled companies, exited businesses, or maintained strong cash flows benefited from both valuation gains and asset accumulation. The interplay between private business value and public market performance helped create and sustain a large millionaire cohort in 2018.
Key Takeaways for Understanding U.S. Millionaire Trends
- U.S. millionaire households reached approximately 11.6 million in 2018, reflecting a strong economic cycle.
- Geographic concentration was significant, with California, Texas, and New York hosting a large share of affluent households.
- Investable assets, rather than home equity, were the standard measure for defining millionaire status in professional reports.
- Equity compensation and business ownership were the dominant wealth drivers for new millionaires during the period.
- Ultra-high-net-worth households, those with $10 million or more, remained a small but influential segment of the population.
FAQ
Reader questions
How many millionaire households were there in the United States in 2018?
Approximately 11.6 million U.S. households had a net worth of at least $1 million, excluding primary residence, according to wealth research from that year.
How many households had a net worth of $10 million or more in 2018?
Around 1.4 million households in the United States reached the $10 million net-worth threshold or higher in 2018.
Which states had the highest numbers of millionaire households in 2018?
California, Texas, and New York led the nation in millionaire household counts, driven by large financial, technology, and media industries.
What was the typical source of wealth for new millionaires in 2018?
Equity compensation, business ownership, and strong performance in public and private markets were the primary drivers of new millionaire creation in 2018.