William J. Onahan Elementary Home

Thank you for visiting our new website! Please check back often as updates are made, and click on article headlines to view full stories where applicable.

Please click the Show All News button for more.

Main Office Summer Hours

Tues. - Wed. - Thurs.
8 am - 12 pm
For an off hours appointment, please call us at 773-534-1180
(The office will be closed 7/28 thru 8/1)

The School News mobile app is now available for Onahan.

Download the School News mobile app!

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Upcoming Events

August 14

Back to School Bash

Time: 5 PM – 7 PM

August 18

First Day of School!

Time: 7:45 AM – 2:45 PM

October 2

School Picture Day

October 24

School Picture (retakes)

February 4

8th Grade Graduation Photos

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About Us

Welcome to Onahan! We believe that parent participation is key to student success; our new website is designed to provide parents with all the information they need to be active participants in their student’s education. You will find that the site works just as well on mobile devices as it does on a desktop so you can find information on the go.

Our Vision

Onahan’s vision is to provide a safe and fun learning environment that promotes mutual respect, inclusion and creative problem-solving. Our team works to inspire the interests and meet the academic and social-emotional needs of all students. With every decision we face, we keep the best interest of children at heart.