The number of new virus cases rose by 370 from the previous day, while the death toll increased by 16, according to public health authorities.
On Wednesday, the Polish health ministry reported a record 30 deaths throughout the day and 357 new coronavirus infections nationwide, compared with 22 deaths and 435 new cases a day earlier.
The first infection was confirmed by Polish authorities on March 4, while the country's first coronavirus fatality was announced on March 12.
Poland has declared a "state of epidemic" and temporarily closed its borders to non-residents in a move to curb the spread of the illness.
Poland’s prime minister on Thursday announced that a swathe of restrictions on daily life were being extended as the country battles the outbreak.
Officials have urged Poles to spend the upcoming Easter holidays at home and scrap any travel plans.