- Emperor Penguins: Estimated population of 200,000 to 500,000 breeding pairs, with a total of around 1 million individuals.
- Adelie Penguins: Estimated population of 2.5 to 3.5 million breeding pairs, with a total of around 5.5 million individuals.
- Chinstrap Penguins: Estimated population of 750,000 to 1 million breeding pairs, with a total of around 2 million individuals.
- Gentoo Penguins: Estimated population of 320,000 to 500,000 breeding pairs, with a total of around 1.2 million individuals.
- King Penguins: Estimated population of 1.2 to 1.4 million breeding pairs, with a total of around 2.5 million individuals.
- Macaroni Penguins: Estimated population of 115,000 to 170,000 breeding pairs, with a total of around 330,000 individuals.
It is important to note that these estimates may vary, and research efforts continue to provide updated population numbers for different penguin species. Additionally, some penguin species are considered vulnerable or endangered due to various threats such as climate change, habitat loss, and human activities.