About Holy Trinity Church
Holy Trinity Church is a Catholic church located at 320 EAST BOSTON POST, Mamaroneck, NY, 10543. Holy Trinity Church was founded in 1886. You can reach Holy Trinity Church at +19146985944.
Where is Holy Trinity Church located?
Holy Trinity Church is located at 320 EAST BOSTON POST, Mamaroneck, NY, 10543. The building sits at coordinates 40.95021, -73.73124, placing it in Mamaroneck, NY 10543.
Location is approximate — drawn from the public street address.
The neighborhood around Holy Trinity Church
The ZIP code 10543 area around Holy Trinity Church is home to 21,281 residents with a median household income of $128,047 and a median age of 40.5 years, according to the US Census Bureau's 2022 American Community Survey 5-year estimates.
US Census Bureau, American Community Survey 2022 five-year estimates.
What to expect at a service at Holy Trinity Church
Roman Catholic parishes follow a structured liturgy called the Mass, celebrated worldwide in the same order.
- Mass lasts about an hour and includes Scripture readings, a homily, hymns, and Holy Communion.
- Visitors are welcome. Only baptized Catholics in good standing receive Communion; others come forward with arms crossed for a blessing.
- Dress is modest but not formal — business casual is typical for Sunday Mass.
Generalized notes for first-time visitors. Individual churches vary — when in doubt, ask a greeter at the door.
Churches in the same diocese as Holy Trinity Church
Holy Trinity Church shares an ecclesiastical jurisdiction with 5 other parishes indexed in Churches List.
- Church of Notre Dame New York City, NY
- Most Precious Blood Church New York City, NY
- Our Lady of Lourdes Church New York City, NY
- Our Lady of Pompeii Church New York City, NY
- Our Lady of the Rosary New York, NY
Churches founded the same year as Holy Trinity Church
5 other churches with a documented founding year of 1886 are indexed in Churches List.
- Cathedral of the Nativity Juneau, AK
- Union Missionary Baptist Church Chicago, IL
- Universal Missionary Baptist Church Chicago, IL
- Upper Room Missionary Baptist Church Chicago, IL
- New Universal Missionary Baptist Church Chicago, IL
Holy Trinity Church by the numbers
Questions and answers about Holy Trinity Church
- What denomination is Holy Trinity Church?
- This church is part of the Catholic tradition.
- Where is Holy Trinity Church located?
- Holy Trinity Church is located at 320 EAST BOSTON POST, Mamaroneck, NY, 10543.
- When was Holy Trinity Church founded?
- Founded in 1886.
Visitor notes about Holy Trinity Church
Short, text-only reflections left by visitors. No ratings, no photographs — by editorial policy.
No notes yet for this church. Visitor notes are coming soon — for now, write to editors@churcheslist.com and we'll post your reflection by hand.