According to Official Guinness Records,
The oldest active pilot is Ernest Eli Smith (USA, b. 21 December 1917), who aged 98 years and 114 days still regularly flies light aircraft, as verified in Red Oak, Iowa, USA, on 13 April 2016. Ernest's grandchildren and friends supported him in this attempt, as they wanted him to achieve the record.
For a complete list of 2016 records, please visit 2016 Guinness Records in United States.