The collection of statistics includes information on the population number and changes thereof, as well as gender, age and ethnic composition of population, demographic burden, number of marriages and divorces, fertility, mortality, longterm migration, and citizenship.
The data are presented in both Latvian and English.
Here is one statistic to get you started: at the start of 2021 the usually resident population of Latvia was 1,893,223.
You can download the data for yourself here.