Site Access

All visitors 16 years of age or over must present a valid form of photo identification. 

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Site access to Argonne National Laboratory is allowed only with an ID badge or a visitor pass. A visitor pass can be arranged by contacting:

The gate pass may be picked up at the Argonne Information Center (AIC) located just outside the Main Gate Guard House off Cass Avenue. The Center is open Monday-Friday, 6:30 a.m. - 5:00 p.m. CST. A pass may be left at the Guard House for pick up during times when the AIC is not open.

A site access visitor pass alone does not permit a user unescorted access to the APS facility; either a temporary or permanent Cardkey® badge is needed for unescorted APS access.


Gate Hours​

  • Main Gate (on Northgate Rd. off Cass Ave.)
    24 hours a day, 7 days a week 
  • West Gate (on Westgate Rd. off Lemont Rd.)
    6:15 am - 7:10 pm Monday-Friday 
  • East Gate (on Eastwood Dr. off Cass Ave.) 
    6:25 am - 9:15 am Monday-Friday
    3:30 pm - 6:00 pm Monday-Friday