Found this concerning Lake County in Indiana on Jury Duty. Don't know if it applies across the board in IN or anywhere else in the US, but sounds like they pick by a combo of drivers license, and tax returns.
http://www.lakejuryduty.org/faq.htm#3
3. How are people chosen to be called for jury service? Top
Prior to 2006, the Lake County jury system obtained the names of Lake County residents who are included on the list of registered voters and the lists maintained by the Bureau of Motor Vehicles. Now, jurors are randomly selected from a combined list including Department of Revenue and Bureau of Motor Vehicles information.
A random selection of 100,000 names is made at the beginning of each year. Throughout the year, prospective jurors are selected randomly from the 100,000 initial jurors and are sent a juror qualification questionnaire/summons. This questionnaire must be completed by the prospective juror and returned to the Office of the Court Administrator. Those individuals who "qualify" for service-a US citizen and county resident; at least 18 years of age; who are able to understand and communicate in English; are not suffering from a physical or mental disability or under a guardianship because of mental incapacity; have not had their rights revoked due a felony conviction and are not a law enforcement officer (criminal trials only) must report for service as indicated on the summons.
On July 1, 2006, juror exemptions have eliminated statewide. This means that no automatic exemptions are available by statute. All jurors must respond to the court as to why they cannot serve and the determination as to defer a juror's service now fails completely on the Court