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Research revelas that the percentage change in state-level marriage rates from 2015 to 2020 is mostly negative. Most states have declines ranging from moderate (−20% to −40%) to substantial (−60% or more). The steepest decreases appear concentrated in parts of the West and South, including states such as California and Louisiana, while only a small number of states—primarily in the Mountain West—show stable or modest positive growth (0% to 40%). Moderate declines are visible

The percentage change in adoption rates across U.S. states from 2012 to 2022 show significant regional disparities. The adoption rates over that decade have declined across most of the states, where the West, South, and Midwest have some of the steepest decreases (approaching −80% to −100% in the darkest categories). In contrast, there are some states which show stable or increasing adoption rates, most notably West Virginia, which stands out with a strong positive change (+4

Recent research suggests notable regional variation on state-level marriage rates (per 1,000 people) in the United States for 2020. While much of the West and parts of the Southeast—such as Utah, Idaho, Wyoming, Arkansas, Alabama, and Tennessee show moderately elevated rates, Nevada stands out with the highest rate, falling within the category of approximately 24.7–30 marriages per 1,000. In contrast, many states across the Midwest, Northeast, and parts of the South fall into