Trend of US Population Under 18 Years By Generation (Foreign-Born)

Updated on December 22, 2025.

According to data from the US Census Bureau, in 2024, the US first generation (foreign-born) population Under 18 Years was 3,333,000 (6.5% of US first-generation population). The second generation Under 18 Years population was 16,970,000 (40.6% of US second-generation population). And, the third-and-higher generation population Under 18 Years was 52,460,000 (21.9% of US third-and-higher-generation population).

The chart and table below shows the trend of the percentage of each generation of US population that are Under 18 Years.

You can see similar information for other age groups.

NB: Universe is the civilian noninstitutionalized population of the United States, plus members of the Armed Forces living off post, or with their families on post, with at least one civilian adult. "First-generation" refers to those who are foreign born; "second generation" refers to those with at least one foreign-born parent; "third-and-higher generation" includes those with two US native parents.

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Trend of US Population By Generation

Data Source: US Census Bureau (Foreign-Born).

Trend of Percentage of Each Generation of US Population Under 18 Years (%)

First Gen

Second Gen

Third+ Gen

Trend of Percentage of Each Generation of US Population that are Under 18 Years

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Year	First Generation (%)	Second Generation (%)	Third and Higher Generation (%)
2024	6.5	40.6	21.9
2023	5.8	40.4	22
2022	5.7	41.8	22.3
2021	5.5	41.9	22.5
2020	5.8	40.7	22.5
2019	6	43.1	22.5
2018	5.7	43.9	22.7
2017	6.2	43.8	22.9
2016	6.2	43.3	23.1
2015	5.9	44	23.2
2014	6.4	44.4	23.3
2013	6	44.6	23.7
2012	6.5	44.9	23.8
2011	6.6	44.7	24.1
2010	7.3	44.8	24.5
2009	7.2	44.5	24.7
2008	7.9	44.8	24.8
2007	8.2	45.2	24.8
2006	8.5	45.3	25
2005	9.2	45	25.2

The chart and table below shows the trend of each generation of US population that are Under 18 Years.

Trend of US Population Under 18 Years By Generation