Barack Obama's age
Some people suspect that Obama was not born in the United States. If his COLD (certificate of live birth) was faked, this would also call into question how old Obama is. (See: Obama birth certificate controversy)
Evidence of birthdate on COLB
Obama's COLB (certificate of live birth) registers him as being born on August 4, 1961. He reportedly moved to Indonesia in 1967 due to his mother's remarriage, therefore making him a minimum of 52 years old.