Welcome to Saint Irenaeus!

We're so happy you're here. We'd like to thank you for checking out our church which has been part of the Cypress community since 1961 - a time when there were more cows than Catholics! We’re an active Catholic community striving daily to strengthen our relationship with God, embrace His message, and answer His call to serve and love one another. If you've been looking for a way to nurture your faith, reconnect, get involved, or simply for a place to pray, we welcome you with open arms!

Be part of our amazing community, register today!


5 p.m. Saturday Vigil

6:30 a.m. Sunday

8 a.m. Sunday

9:45 a.m. Sunday*

11:30 a.m. Sunday

1:15 p.m. Sunday (Español)*

4 p.m. Sunday

5:30 p.mSunday

*9:45 a.m. and 1:15 p.m. Sunday Masses, as well as 8:30 a.m. Monday–Saturday Masses, are also live-streamed on Saint Irenaeus Facebook @stirenaeuschurch.

Want to attend a Mass service, but have never gone to one before and not sure you want to go alone? Our Adult Faith Formation (AFF) is there for you! Send an email or call our Parish Office and we'll arrange for someone from AFF to accompany you. Maybe you're interested in learning more about the Catholic Church. If so, simply send an email to Cassandra at aff-email@sticypress.org. God bless you!

Meet our priests!


    Fr. binh Nguyen

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    fr. ian gaston

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  • Parochial vicar

    Fr. Romeo Ascan, AM

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Are you a returning Catholic?

Welcome! We are delighted to have you visiting our website. Join us at our next Sunday Mass or whenever the Spirit moves you!

Curious about what sets Saint Irenaeus apart from other churches? It is the people, like you, who turn our congregation into a friendly, extended, family. We hear it time and time again, "Saint Irenaeus feels like home." It is a great place to pray, worship, socialize, revitalize your faith, and volunteer.

If you are feeling a little tentative about attending Mass after being away, our Adult Faith Formation (AFF) is here for you! Send an email or call our Parish Office and we will arrange for someone from AFF to accompany you.

Thinking about becoming Catholic?

The Order of Christian Initiation of Adults (OCIA), formerly RCIA, welcomes and initiates those who choose to become Catholic by providing Catholic Christian formation. OCIA is for adults who have never been baptized as a Christian, and for adults who have been baptized in another Christian faith and now want to be Catholic. Our OCIA program begins in September.

This is a remarkable process that will change how you see the world. Want to learn more? Call us at 714-826-0760 or send an email.

Adult Faith Formation



Sunday, September 17

5 p.m. at the AFF reserved table

Our Summer Gatherings are designed for adults (18 years or older) who are interested in becoming Catholic and for adults who are already Catholic but wish to complete their Sacraments of Initiation.