This prediction market asks whether any U.S. state will experience a population decrease of at least 10% between 2025 and 2035. The question is not about a specific state, but about the possibility of any state crossing that threshold. A 10% decline over a decade is a dramatic demographic shift, far exceeding the typical annual changes most states see. For context, the U.S. population grew by about 7.4% between 2010 and 2020, and no state lost more than 3.2% of its population during that period (West Virginia). A 10% decline would represent an accelerated and sustained exodus, driven by factors such as economic stagnation, climate change, or shifts in employment opportunities. Population trends in the U.S. have become increasingly polarized. States in the Northeast and Midwest, such as New York, Illinois, and West Virginia, have experienced slow growth or outright decline in recent decades, while the South and West have absorbed most of the nation's growth. The COVID-19 pandemic accelerated some of these patterns, with remote work enabling migration to lower-cost and warmer regions. However, the pandemic also introduced volatility, with some states like Idaho and Montana seeing surges, while others like California and New York saw net outflows. The 2020 Census and subsequent estimates from the Census Bureau show that many states are growing, but a few are losing residents. For example, between 2020 and 2023, California lost over 500,000 residents, and New York lost over 600,000, though these losses are still small relative to their total populations (about 1.5% and 3% respectively). To reach a 10% decline, a state would need to lose roughly 1 in 10 residents in a decade, a pace that has not been seen in modern U.S. history, except in extreme cases like the Dust Bowl or post-Katrina Louisiana. The interest in this market stems from the broader conversation about demographic change, economic competition, and climate adaptation. Investors and policymakers are watching migration patterns to anticipate changes in tax bases, political representation, and housing markets. A 10% decline would trigger significant realignment in federal funding, congressional seats, and state budgets. The market also reflects a bet on whether current trends will accelerate or reverse, making it a barometer for public sentiment about the future of American geography. Currently, the market is trading at low odds, suggesting that most participants believe a 10% decline is unlikely. However, the question remains open, and the next decade will reveal whether any state can sustain such a rapid loss. Factors like the aging population, birth rates, and international migration will play a role, as will unexpected shocks such as natural disasters or economic crises.

Historical Context

The United States has experienced significant population shifts throughout its history, but a 10% decline in a single state over a decade is rare. In the 20th century, the Dust Bowl of the 1930s led to large out-migration from Oklahoma and neighboring states, but even then, the losses were not sustained over a full decade. More recently, Louisiana lost about 5% of its population after Hurricane Katrina in 2005, but that was a one-time event, and the state has since partially recovered. The closest example to a 10% decline might be the population losses in the Great Plains in the 1980s, but those were spread over several states. In the 2010s, the U.S. as a whole grew at its slowest rate since the Great Depression, and many states in the Northeast and Midwest saw stagnant or declining populations. West Virginia was the only state to lose population in every year of the decade, with a cumulative loss of 3.2%. Illinois lost about 1.4% of its population, and Connecticut lost about 1.1%. These declines were driven by factors such as deindustrialization, lack of economic opportunities, and an aging population. However, none came close to a 10% loss. The COVID-19 pandemic in 2020 brought a shift in migration patterns, with many people leaving large cities and high-cost states for suburban and rural areas. Between 2020 and 2023, California, New York, and Illinois experienced significant net out-migration, while states like Texas, Florida, and Idaho saw inflows. Yet even the hardest-hit states lost less than 4% of their population in that three-year period. The pandemic also affected birth rates and immigration, which are key components of population change. The 2020 Census showed a population that was more diverse and older, and these trends are expected to continue. Looking forward, demographic projections from the Census Bureau and other institutions suggest that the U.S. population will grow slowly, but the distribution will shift. The South and West are expected to gain population, while the Northeast and Midwest may see further losses. However, a 10% decline in any state would require an unprecedented combination of factors, including sustained out-migration, low birth rates, and possibly a catastrophic event. Historical precedent suggests that such a decline is unlikely, but not impossible, especially if a state faces a long-term economic collapse or climate-induced disasters.