At this moment, in America, there is no distinction within the U.S. Red Cross between blood that was donated by vaccinated versus unvaccinated individuals.

When you donate blood, the organization asks you whether you’ve received the COVID-19 vaccine, but that has nothing to do with your eligibility.

In fact, the Red Cross website makes a special point to mention that:
“The Red Cross, like all blood collectors in the U.S., is required to follow the eligibility guidelines set by the [FDA] … The FDA permits individuals to donate blood with no wait period after receiving a COVID-19 vaccine as long as they are feeling well and symptom free, and the vaccine they received is one approved by the FDA for use in the US.”

This means that as long as you say that you’re feeling alright, your COVID-19 vaccination status does not affect your eligibility to donate blood.