The number of new virus cases rose by 330 from the previous day, while the death toll increased by 11, according to public health authorities.
On Sunday, the Polish health ministry reported 15 deaths throughout the day and 345 new coronavirus infections nationwide, compared with nine deaths and 288 new cases a day earlier.
Meanwhile, 5,816 people have recovered from COVID-19 throughout the country, the health ministry said.
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 since declared a "state of epidemic" and temporarily closed its borders to non-residents in a move to curb the spread of the illness.
International scheduled flights and passenger rail connections were suspended on March 15.
In another move to contain the spread of the COVID-19 epidemic, the government has closed all pubs, clubs and restaurants.
Some restrictions were relaxed last month, and hotels and shopping malls were allowed to reopen last week as the country moved to the next phase of easing its coronavirus lockdown.
Public gatherings of more than two people remain banned.
Health and government officials have urged Poles to stay home and practice social distancing.
People have been ordered to wear masks or other face coverings when out in public.
Schools are due to remain shut until May 24 as Poland battles the epidemic.
Meanwhile, nurseries and preschools throughout the country have been given the green light to resume operations.
Poland also reopened outdoor sports areas last week and plans to allow its top football league to resume behind closed doors at the end of this month.
Source: IAR, PAP