United Blood Services collected 61 units of blood at its main location on Omaha Street throughout Tuesday, about 20 more units than they collect on an average day.
Bob Garcia with UBS called it a "very, very good day."
He added they wouldn't have the figures on how much they collected at the mobile unit in Spearfish until much later after they get back.
That mobile unit collected until six.
On the day of the terrorist attacks in 2001, United Blood Services in Rapid City collected 188 units of red blood cells from a crowd of about 500 people who wanted to help in any way they could.
Tuesday, UBS thanked those who donate as it continues its mission.
The blood bank is offering donors food from Texas Roadhouse to commemorate the day.
Forty-three people were scheduled to give blood at the location on Omaha Street throughout the 9/11 anniversary, and there was a mobile bank at the Rec and Aquatics Center in Spearfish.
And while Bob Garcia with UBS expected more walk-in traffic Tuesday, the donors we talked to said the anniversary didn't really factor in to their decision.
"I don't think that would have much to do with it," said Marvin Kammerer of Meade County. "I think it should be a personal commitment to your community as an ongoing thing."
United Blood Services was open until 5:30 p.m.