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Contact Us Natrona County Public Library By Phone Main Library (307) 237-4935 Mills Branch (307) 265-6017 Edgerton Branch (307) 437-6617 By Fax (307) 266-3734 By Mail To mail a request or comment to the library: Natrona County Public Library 307 East Second Street Casper, Wyoming 82601 By E-mail You can e-mail a request or comment to the library by sending it to: reference@natronacountylibrary.org Suggest a Purchase Didn't find what you were looking for in the library catalog? Suggest a purchase Contact the Webmaster For problems with the web site, you can contact the webmaster at: boneil@natronacountylibrary.org Receive Emails about Library Events Email: