There isn’t a single clean number for “how many illegals entered” under Trump’s first term versus Biden, because the government usually reports border encounters and removals , not a direct count of every unauthorized entrant.

What the data can say

  • Under Biden, one widely reported estimate says the unauthorized immigrant population reached about 14 million in 2023 , which reflects people already living in the U.S., not just new arrivals.
  • For border activity, a PolitiFact/PBS fact check notes that during Biden’s last seven days there were 20,086 border encounters, while Trump’s first seven days had 7,287 encounters; that is about a 60% drop , not the 95% figure the White House promoted.
  • The same fact check says encounters under Trump first rose and fell over time, so short windows can be misleading.

Deportations, not entries

If you meant removals rather than entries, the picture is different:

  • BBC reported that in the last fiscal year of Biden’s term, U.S. immigration authorities removed over 271,000 undocumented immigrants, exceeding Trump’s 2019 record.
  • That means Biden’s administration ended up with a higher deportation total in at least one recent year than Trump’s first-term peak.

Bottom line

If your question is about illegal border crossings , there is no single official total for all of Trump’s first term vs. all of Biden’s term, and encounter data is the closest commonly cited proxy. If you want, I can turn this into a simple side-by-side table of encounters, removals, and estimated unauthorized population.