**Table 1:** Comparison of total population and nativity percentages over time.
Year	Total Pop	Foreign Born	Native Born
2024	579,290	33.6%	66.4%
2023	572,549	32.8%	67.2%
2022	572,079	31.6%	68.4%
2021	571,963	30.8%	69.2%
2020	555,208	30.1%	69.9%
2019	554,033	30.1%	69.9%
2018	553,066	30.0%	70.0%
2017	557,320	29.9%	70.1%
2016	550,436	29.7%	70.3%
2015	548,744	29.5%	70.5%
2014	545,236	29.5%	70.5%
2013	540,568	29.2%	70.8%
2012	536,383	29.1%	70.9%
2011	532,378	28.8%	71.2%
2010	529,547	28.8%	71.2%

Nativity & Citizenship FAQs for Union County, New Jersey

Approximately 33.6% of residents in Union County, New Jersey were born outside the United States.

The vast majority of residents, roughly 83.4%, are U.S. citizens (including both native-born and naturalized citizens).

Union County, New Jersey Nativity & Citizenship Status (2024)