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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Assumption of the Blessed Virgin Mary

The Assumption of the Blessed Virgin Mary is Wednesday, August 15th, and is a Holy Day of Obligation.  

Mass Times:

Tuesday, August 14th

7:00 pm (Vigil Mass)

Wednesay, August 15th

7:30 am 
12:00 pm
6:15 pm (Rosary)
7:00 pm
7:00 pm (Spanish Mass)
8:30 pm (Polish Mass)

Note:  Spanish and Polish Masses will be in Cana Hall.  All other Masses will be in the Main Church. 

Year of the Eucharist
at St. Mary's

The Year of the Eucharist at SMI is in full swing! 

Our next event is Project 177 on Thurs. September  27th.  Project 177 is an evening of Adoration with Praise and Worship and Confession.  It is a free event, and tickets can be found at iTickets.com.  SMI will be providing tickets as the event gets closer.  Check out our bulletin and social media for more information.

We will have many events during Summit at SMI including: 
Eucharistic Miracle Displays Sept 22/23, Nov 17/18,
March 9/10, April 27/28.  


R.E. and Confirmation Registration

Registration for upcoming Religious Education and Confirmation classes is ongoing until the start of classes on Tuesday, September 4th.  We are also still in need of many catechists and mentors for the upcoming year.  All materials for teaching will be provided.  For more information on registration, please contact the R.E. or Confirmation offices at 815-436-4501.


Back to School Blessing of Backpacks

As we usher in the new school year, all students, parents, and teachers are invited to the Blessing of Backpacks during next weekend's Masses.  Bring your students to get their backpacks blessed (make sure their school supplies are in the backpack too!) as we kick off the new academic year.  Hope to see you there!

Protecting God's Children

Out of concern for the safety and well-being of children, every diocesan, parish, school, or religious education employee or volunteer who is involved with minors on a regular, recurring basis and those who may have an opportunity to be alone with children during parish, school, or religious education sponsored events are required to attend a Virtus Protecting God's Children program.  The following dates will have classes at St. Mary Immaculate in Faith Sharing Room.  Please call Pat Mander at 815-436-2651 x893 to register.

Monday, August 13:  7:00-10:00 pm
Thursday, August 23:  7:00-10:00 pm
Tuesday August 28:  7:00-10:00 pm
Wednesday, September 12:  9:30 am-12:30 pm
Tuesday, September 18:  7:00-10:00 pm
Thursday, October 11:  9:30 am-12:30 pm
Tuesday, October 23:  7:00-10:00 pm















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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