John Glenn
- Biography of the astronaut was given the opportunity for a second space flight 36 years after his first flight.
- http://starchild.gsfc.nasa.gov/docs/StarChild/whos_who_level2/glenn.html

John Glenn, Jr.
- Biographical data for the American astronaut provided by NASA.
- http://www11.jsc.nasa.gov/Bios/htmlbios/glenn-j.html

Glenn, John Herschel, Jr.
- Brief biography about the astronaut from Fact Monster.
- http://www.factmonster.com/ce6/people/A0821004.html

John Hershel Glenn, Jr.
- Student's report about John Glenn, first American to orbit in space.
- http://dusd.k12.ca.us/des/bwebb/reports/space/glenn.html

Glenn, John
- Encarta encyclopedia article about the first American to orbit in space.
- http://encarta.msn.com/encyclopedia_761563272/Glenn_John_Herschell_Jr.html