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





Walking with Purpose
Women's Bible Study

Begins Tuesday, Sept. 12

Choose from 2 sessions on Tuesdays, either 9:30 am-11:30 am or 7:00 pm-9:00 pm 

This women's scripture study will look at modern day advice from women in the Bible. The cost is $40 for the workbook, please register via forms at the commons desk by August 27th.  

Questions? Contact Laurie Hovland by Email or at
630-995-0328 for more info.


Fr. Pat's Installation
Mass & Reception

Saturday, September 2
4:00 pm Mass

Please join us at the 4 pm Mass on Saturday, September 2nd for the Installation Mass of Father Pat Mulcahy as pastor of St. Mary Immaculate Parish by the Bishop of the Diocese of Joliet, the Most Reverend Bishop R. Daniel Conlon.

A short reception with light refreshments will follow in the gym for an opportunity to greet and welcome Bishop Conlon and Father Pat. 

Protecting God's
Children Workshops

Out of concern for the safety and well-being of children, every diocesan, parish, school or RE employee or volunteer who is involved with minors on a regular basis and those who may have an opportunity to be alone with children during parish, school or RE sponsored events, are required to attend a Virtus Protecting God’s Children program.

We have scheduled Protecting God’s Children Workshops for the following dates:
Wed., August...READ MORE 


Helping Hearts and Hands

Have you ever thought of volunteering your time but are afraid to because the commitment might be more that you want? Well here is your opportunity to get your hands dirty one day a month for two or three hours. Helping Hearts and Hands is a group of St Mary’s parishioners that help primarily our senior population or anyone that needs help accomplishing household tasks. These tasks include mowing, trimming, raking, weeding, mulching, painting, power washing, window washing and light duty household repairs. Many projects can be family friendly. Interested? Contact Paul King at 815-735-2911 or paul@northweststeel.com.   

SMI Offers $1,000 off to Transfer Students

St. Mary’s is pleased to offer a Tuition Transfer Grant to any parishioner who transfers their child into Grades K-7 from any private*, public, charter or home school. This grant will be applied to offset the current school tuition. St. Mary’s rigorous curriculum exceeds state and diocesan standards and our students consistently perform in the top of their high school classes. Our new state of the art STEM lab and 1:1 program sets our school apart from many others. With our smaller class sizes and many extracurricular activities, your child will have a greater opportunity to excel. We take pride in providing an outstanding Catholic education that has...LEARN MORE


Catholic Ministries Annual Appeal - Help Us Reach Our Goal

If you have not made your contribution to the 2017 Catholic Ministries Annual Appeal, please consider doing so. Our amount pledged is $223,154 with $145,166 having been paid. You can participate by going online at jolietdioceseappeal.org, or by mailing in your gift. After our parish exceeds its CMAA goal of $226,217 in paid pledges, 70% of any additional funds are returned for use in our parish. One pledge can make a difference, especially when combined with all of the other pledges made throughout the Diocese. Please prayerfully consider providing your financial support to this year’s Appeal, “Held in God’s Hands.” You can make a real difference!

















Masses 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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