Ripped straight from https://www.reddit.com/r/Blooddonors/wiki/index/find-a-center/. It's a good resource! Props to u/Yay_Blood for caring enough to put all this stuff together in the first place!

Ready to donate? Find a center or blood drive!

United States

Use this search from AABB to find a donation site in the U.S. This doesn't include mobile drives, but you can find these on the websites for the closest fixed locations.

Canada

Here's the Canadian Blood Services donor centre search.

Mexico

Check out Blooders.org.

Europe

Use the search feature on this page from the European Blood Alliance to find a blood agency near you. Their websites should all have a search tool you can use to find the closest donation center in your country.

U.K.

Find a center with the NHS.

Australia

Find a center with the Australian Red Cross.

South Korea

This page has a link to a list of blood donation centers.

Lebanon

DSC has information about blood donation and how to get started.

India, Sri Lanka, Bangladesh, Nepal, Malaysia, Oman, & Yemen

Friends2Support.org

From their page: "Friends2Support.org is the world’s largest voluntary blood donors’ organization with services available in India, Sri Lanka, Bangladesh, Nepal, Malaysia, Oman and Yemen. The organization's main aim is to have a society wherein there is no shortage of blood in the most critical situations. Friends2Support.org has more than 5,00,000 voluntary blood donors across the world and soon targets to reach 10 million mark."

Philippines

The Philippine Red Cross has information on donation locations and commonly asked questions.

Turkey

This site connects donors with those who need blood donations: http://www.acilkanaraniyor.com/