Smithfield's proud owner Fran Martin, 54, sells them for £8 over the internet, reports The Sun.
Ten-year-old Smithfield, who holds the paintbrush in his mouth, has now become a celebrity across America.
He trots out at charity events and has appeared on Oprah Winfreys TV show.
Fran, from Virginia, said: "Smithfield is a very clever pig. He's done hundreds of paintings."
Scientists say pigs are colour blind but Fran reckons Smithfield can tell the difference.
She added: "He likes blue best. He definitely picks up the blue brush more frequently than any other." (The Sun)