These new cases were reported on Sunday, he said.
As the virus claimed the lives of 16 more people, the death toll in the district reached 10,645.
The Covid-19 mortality rate in Thane stood at two per cent, he added.
Details of recovered and under-treatment patients were not provided by the district administration.
In neighbouring Palghar district, the Covid-19 case count has gone up to 1,16,229, while the death toll is 2,546, another official said.