They are launching the Missing Types campaign to raise awareness that there is not enough type A, B and O blood to meet all the need.
The Red Cross in Bangor is encouraging everyone to donate throughout the summer.
"The American Red Cross is totally dependent on volunteers to help us. Volunteer blood donors and volunteer sponsors for our blood drives. Without these volunteers, we wouldn't be able to help these patients in need of blood products," said Local Market Manager Tom Hinman.
According to Red Cross officials, only three out of 100 people in the United States donate blood. They said by donating, someone could help kids with cancer, accident victims and patients fighting life-threating conditions.
Visit the Red Cross website for information about donating.