Since February 24, 2022, when Russia invaded its neighbour, more than 10.4 million people have crossed into Poland from Ukraine, according to the Polish Border Guard agency.
Meanwhile, more than 8.5 million people have left Poland for Ukraine since the start of the Russian invasion, the agency said.
On Friday, around 21,600 people crossed from Poland into Ukraine, it also reported.
The Polish presidential office said earlier this month that around 1.3 million war refugees from Ukraine were staying in Poland after many who had fled Russia's invasion moved on to other countries or decided to return to Ukraine.
A deputy prime minister said in December that Poland was home to more than 2 million Ukrainians, including those who arrived before the war.
In March last year, Poland enacted a measure to offer wide-ranging support to Ukrainians escaping the Russian invasion of their country.
The measure grants them residence rights and ensures access to education, healthcare and social benefits.
Seventy-eight percent of Poles are in favour of accepting refugees from war-torn Ukraine, according to a survey published in late January.
Saturday is day 388 of Russia’s war in Ukraine.