The 19-year-old winger, who has been a regular in the reserves at the Premier League club, will stay at New York Stadium until January 5 and could make his debut at home to Cheltenham in League Two on Saturday.
"I have been playing for Aston Villa under-21s and was made aware a few clubs had expressed an interest in signing me," Cameron said.
"My agent got a call from Rotherham United and then from Steve Evans and it went from there.
"The stadium is fantastic. I spoke to the manager and the assistant and was impressed with what they had to say, so I am just really excited about getting started.
"I am a wide man by trade but I can play left-back or on either flank. I like to stay wide and get crosses into the box and provide for the strikers, and hopefully I can do that."