Welcome to

St. Mary Immaculate Parish

A Roman Catholic Parish in the Diocese of Joliet

15629 S. Rt. 59, Plainfield, IL 60544     815.436.2651

Office Hours:  M-Th: 8:15 am-4:15 pm, F: 8:15 am-1:00 pm
Receptionist Available:  During Weekend Masses and Evening Events
See Calendar for Evening Building Closures 





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Catholics Returning Home

Catholics Returning Home beings on Monday, July 16th from 7:30 - 9:00 pm in North Wing Room A.  In this six week program, Catholics can reconnect with their faith, and their relationship with Christ.  This program offers:

- A supportive, non-judgmental group where you can freely explore your concerns and questions
-  Small community including others thinking about returning, recently returned Catholics and clergy.
-  Safe haven in which private issues are identified and dealt with privately, with compassion.

Click HERE for details. 

Year of the Eucharist
at St. Mary's

We kicked off our Year of the Eucharist at St. Mary Immaculate called Summit on Corpus Christi, Sunday, June 3, 2018. The Eucharist is the Source & Summit of our Christian life and God calls us to take that Love which we receive and bring it to all people.

We will have many events during Summit at SMI including: 

Mass & a Movie: August 10.  
Eucharistic Miracle Displays Sept 22/23, Nov 17/18,
March 9/10, April 27/28.  
Project 177: An evening of Prayer & Worship  
Sept. 27. Stay tuned to our website & bulletin for details!


Pancake Breakfast on July 29th

Join St. Mary's Venturing Crew 19 on Sunday, July 29th from 8:00 am - 12:00 Noon in the St. Mary Immaculate Gym for a Breakfast of Champions!  Tickets for this Pancake Breakfast Fundraiser cost $5 in advance, or $6 at the door.  To purchase tickets or for any additional information, contact Mary Ellen McCoy at memccoy319@sbcglobal.net.

Theology on Tap Continues

All young adults are invited to Theology on Tap in Plainfield! FIAT, SMI's Young Adult Group is hosting a location again this summer! Join us every Thursday in July at 7:00 pm at Fox's Restaurant & Pub at 14206 U.S. 30, Plainfield, IL 60544, to grab some food and drinks while hearing an awesome talk on a variety of subjects.

Catholic Ministries Annual Appeal Update

If you have not had an opportunity to participate in the Catholic Ministries Annual Appeal (CMAA) this year, there is still time. Please prayerfully reflect on God’s gifts to you and give a gift to the CMAA. Participation is the key to a successful appeal, and a chance for our parish to receive a parish rebate, too. Every gift helps! If you do not receive a mailing and would like to make a gift to the CMAA, please call the Diocese of Joliet Development Office at 815-838-8515, or if you wish to make your gift online, please visit www.jolietdioceseappeal.org.















Mass Times

4:00 pm
7:30 am
9:00 am
10:45 am
12:15 pm
6:00 pm (Contemporary Mass)

5:30 pm (Church)
12:15 pm (Cana Hall)

9:00 am (Cana Hall)


7:30 am


3:00-4:00 pm (Church)

(Or by appointment with the priests. To make an appointment contact the Parish Office at 815.436.2651)



Continuous exposition of the Most Blessed Sacrament from Sunday 7:00 pm through Friday 9:00 pm except on First Fridays when exposition continues overnight to Saturday 7:00 am.







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