State, with an estimated population of 38.9 million as of 2023 [1] the state has people from a wide variety of ethnic, racial, national, and religious backgrounds. This is a list of u.s States, the district of columbia and territories by median age in 2020 [note 1] the median age is the index that divides the entire population into two numerically equal age groups, one younger than that age and the other older than that age It is the only index associated with the age distribution of a population.
California, the most populous state, contains more people than the 21 least populous states combined, and wyoming, the least populous state, has a population less than any of the 31 most populous u.s The populations of these former territories as reported in the census are listed below It typically takes the shape of a pyramid when the population is growing The united states is the most populous country in the americas and the western hemisphere, with a projected population of 342,034,432 on july 1, 2025, according to the u.s [1] with about 4% of the world's population, it is the third most populous country Population grew 2.6% between the 2020 federal census of 331,449,281 residents and the 2024 official annual estimate.
It borders oregon to the north, nevada and arizona to the east, and shares an international border with the mexican state of baja california to the south With almost 40 million residents across an area of 163,696 square miles (423,970 km 2), it is the largest state by population.
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