Christopher W. Saunders, 28, of Crawford Court, is wanted for questioning, according to Columbia County sheriff's Capt. Steve Morris.
The Loomis armored-truck driver told police that about 10:40 a.m., a man with a weapon hit him on the head and stole a bag of cash outside the Wells Fargo Bank branch at Belair and Columbia roads.
The truck driver was trying to put money into the ATM when the robber assaulted him with the unidentified weapon, Morris said.
The driver wasn't seriously injured.
The robber was described on sheriff's office scanner broadcasts as a slim, tall black man wearing a black cap, black muscle shirt and black shorts with white stripes. He was seen running from the area toward Highview Drive in Martinez.
Anyone with information about Saunders' whereabouts is asked to call the Columbia County Sheriff's Office at (706) 541-2800.