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





Make a Difference
Day Sign Ups OPEN


Saturday, October 15
Click HERE to Sign Up

A Day of Faith and Service to Bring Jesus to Others. Dozens of meaningful, family oriented service projects are offered at SMI and out in the community on Make a Difference Day. It’s a great opportunity for everyone to come together in loving service and fellowship! The wide assortment of service projects offers something suitable for all ages, including families with youth, teens, young adults, and seniors.


ALPHA Film Series
for Young Adults

Tuesdays, 6:30-9:00 pm
starting Sept. 20

SMI's NEW Young Adult Group FIAT invites all Young Adults ages 18-35 to join them for the ALPHA Film Series!
The series takes place at St. Mary Immaculate Tuesday evenings starting September 20. The night consists of a free catered dinner, short video, and discussion. Childcare available if needed. You MUST register to attend. For more information, to view the trailer and to Register, Click HERE to signup.

SMI 2nd Annual

Saturday, Sept. 24
5 pm - 10 pm @ SMI

21 & older event. Come join us for the St. Mary Immaculate Parish Men’s Club Oktoberfest Celebration in the school parking lot on Saturday, Sept. 24th starting at 5 pm. The event will feature a live German band, which will get us all in the mood for a traditional Munich-style Oktoberfest. We will be serving German-Style Bratwursts, Sauerkraut, Potato Salad, Pretzels, and of course, Oktoberfeststyle Beer.



Hot Topics with Fr. David SEASON 2 starts Sept. 21

Continuing the Conversation: Hot Topics with Fr. David is Back! All New Topics, Same Great Discussion. A 6 session series on topics relating to our culture and how we can respond from the perspective of the heart of Jesus! Come to 1 or come to all 6, everyone is welcome! Fall Sessions and Topics (All sessions begin at 7:00pm in the Upper RoomWed. Sept. 21: Dying with Dignity: Euthanasia and Assisted Suicide; Wed. Sept. 28: Brother Sun, Sister Moon: A Catholic Response to Climate Change; Wed. Oct. 5: Racism Today and the Christian’s Role; Thurs. Oct. 13: The Family in Crisis: Trying to Make it Work in a Broken World; NO SESSION THE WEEK OF OCT. 16-22; Thurs. Oct. 27: Heaven, Hell, and Purgatory: What is it all about?; Thurs. Nov. 3: Who is My Neighbor? Immigration and Refugees. 


Protecting God's Children Workshops

We have scheduled Protecting God’s Children Workshops for the following dates:
Mon., October 3  9:30a–12:30p Stewardship/Unity Rooms; Wed., October 19 7pm-10pm
Stewardship/Unity Rooms; Mon., November 7 9:30a–12:30p Stewardship/Unity Rooms 
Please call the Religious Education Office at 815-436-4501 to register.

Annual Golf Outing Save the Date Friday, September 30

Join us for the 19th Annual St Mary Immaculate Parish Golf Outing at the Bolingbrook Golf Club on Friday, September 30th. The outing includes lunch, golf, cocktails, dinner, raffles & prizes. All proceeds raised at this event benefit an educational fund for the wonderful teachers at St. Mary Immaculate Parish School. For more information on the event and sponsorship opportunities, please visit http://smigolf.org.
















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)

4:00-5:15 pm (North Wing Room A)

(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.

  Connect with 
  our Parish! 



  Click here for the

full Parish Calendar





Online Giving

Online Giving

Secure and Convenient Donate now!