Real name: Scott Lang
Other known aliases: Ant-Man
Identity: No longer secret, but not widely known

Known relatives: Cassandra (daughter), Jonathan (nephew), Peggy Rae (ex-wife), Ruth (sister), Carl (brother-in-law)

Age: 49yrs.
Place of birth: New York, New York
Legal status: Citizen of the United States with no criminal record
Marital status: Divorced
Occupation: Electrical engineer

Group affiliations: (former) Fantastic Four, Heroes for Hire
Base of operations: (current) Condominium in upstate NY, (former) Baxter Building, Oracle Inc., Avengers' Mansion

First appearance: 

Height: 5'11"
Weight: 168 lbs.
Eyes: Brown
Hair: Dark Blonde
Other distinguishing features: None

Strength level: Mr. Lang possesses the normal human strength of a man of his height, weight, age, and build who engages in moderate regular exercise.
Known metahuman abilities: Mr. Lang developed the ability to shrink in size to about half inch and later return to normal size at will due to prolonged exposure to Pym particles. 
Known technological abilities: None
Other known abilities: None
Known special skills: Cybernetics, electrical engineering, mechanical engineering, weapons tinkering, Ant-Man paraphernalia (piloting, repair, and design)