Company lists · Data refreshed September 2026

Top 25 Catholic secondary schools based in the United States

Name: Catholic secondary schools based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 1,917 companies tracked

RevenueBase identified 1,917 catholic secondary schools headquartered in the United States as of September 2026 and tracks 45,080 professional contacts across them, including 13,785 with verified work emails. Chicago is the largest hub.

This list covers catholic secondary schools headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

1,917Companies

45,080Contacts tracked

13,785Verified emails

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The 25 largest catholic secondary schools based in the United States

Ranked by team size

Top 25 of 1,917 catholic secondary schools based in the United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to catholic secondary schools: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Notre Dame High School	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 19, 2026	201-500	488 contacts →
	Strong evidence “Notre Dame High School is the preeminent Catholic coeducational college preparatory school in the City of Angels.” Source: RevenueBase Database · checked Sep 19, 2026
2	Immaculate Conception School	Strong evidence	Minneapolis, United StatesHQ checked Sep 19, 2026	n/a	473 contacts →
	Strong evidence “Immaculate Conception Catholic School is a Catholic School filled with the rich traditions of those who have attended these past 70 years and will continue to be a faith-filled…” Source: RevenueBase Database · checked Sep 19, 2026
3	St. Mary School	Indirect evidence	Riverside, IL, United StatesHQ checked Sep 19, 2026	n/a	415 contacts →
	Indirect evidence “Our mission is to provide the children of St.” Source: RevenueBase Database · checked Sep 19, 2026
4	ST Joseph High School	Indirect evidence	Trumbull, CT, United StatesHQ checked Sep 19, 2026	51-200	358 contacts →
	Indirect evidence “St.” Source: RevenueBase Database · checked Sep 19, 2026
5	Marist School	Strong evidence	Atlanta, GA, United StatesHQ checked Sep 19, 2026	51-200	323 contacts →
	Strong evidence “Marist School is an independent, Roman Catholic, college-preparatory day school enrolling approximately 1,100 boys and girls in grades seven through twelve.” Source: RevenueBase Database · checked Sep 19, 2026
6	Holy Trinity Catholic School	Indirect evidence	Des Moines, United StatesHQ checked Sep 19, 2026	51-200	310 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
7	Mater DEI High School	Strong evidence	Santa Ana, CA, United StatesHQ checked Sep 19, 2026	201-500	306 contacts →
	Strong evidence “Mater Dei High School, a co-educational college preparatory Diocesan Catholic high school, provides a holistic education and serves a diverse community of students committed to…” Source: RevenueBase Database · checked Sep 19, 2026
8	Santa Margarita Catholic High School	Strong evidence	Rancho Santa Margarita, CA, United StatesHQ checked Sep 19, 2026	51-200	273 contacts →
	Strong evidence “Santa Margarita Catholic High School seeks to bring the nurturing charism of Caritas Christi – the love of Christ – to our community of faith and learning.” Source: RevenueBase Database · checked Sep 19, 2026
9	St. Thomas More Catholic School	Indirect evidence	St. Paul, MN, United StatesHQ checked Sep 19, 2026	n/a	272 contacts →
	Indirect evidence “MISSION: St.” Source: RevenueBase Database · checked Sep 19, 2026
10	ALL Saints Catholic School	Strong evidence	Canton, MI, United StatesHQ checked Sep 19, 2026	51-200	252 contacts →
	Strong evidence “Welcome to All Saints Catholic School!” Source: RevenueBase Database · checked Sep 19, 2026
11	Archbishop Mitty High School	Strong evidence	San Jose, CA, United StatesHQ checked Sep 19, 2026	201-500	246 contacts →
	Strong evidence “Archbishop Mitty High School is the Catholic, coeducational, college preparatory school of the Diocese of San Jose.” Source: RevenueBase Database · checked Sep 19, 2026
12	Bishop O'dowd High School	Strong evidence	Oakland, CA, United StatesHQ checked Sep 19, 2026	51-200	230 contacts →
	Strong evidence “Founded in 1951, Bishop O'Dowd High School is known for its commitment to Catholic, college preparatory education.” Source: RevenueBase Database · checked Sep 19, 2026
13	Saint Ignatius College Prep	Strong evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	51-200	226 contacts →
	Strong evidence “Saint Ignatius College Prep, a Jesuit Catholic school in the heart of Chicago, is a diverse community dedicated to educating young men and women for lives of faith, love, service…” Source: RevenueBase Database · checked Sep 19, 2026
14	St. Thomas High School	Strong evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	51-200	221 contacts →
	Strong evidence “A Catholic college preparatory school for young men in grades 9-12, the student body is representative of the city of Houston and students come from more than 125 zip codes.” Source: RevenueBase Database · checked Sep 19, 2026
15	Academy Of The Holy Names	Indirect evidence	Tampa, FL, United StatesHQ checked Sep 19, 2026	51-200	211 contacts →
	Indirect evidence “The Academy of the Holy Names empowers students to be authentic individuals who engage in independent thought, are inspired by creativity, and lead culturally aware, spiritually…” Source: RevenueBase Database · checked Sep 19, 2026
16	Sacred Heart Cathedral Preparatory	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	51-200	209 contacts →
	Indirect evidence “Inspired by the Daughters of Charity and the De La Salle Christian Brothers, in partnership with families, Sacred Heart Cathedral Preparatory’s mission is to provide the finest…” Source: RevenueBase Database · checked Sep 19, 2026
17	Cathedral Catholic High School	Strong evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	51-200	207 contacts →
	Strong evidence “Mission Statement: Cathedral Catholic High School is an innovative academic community of lifelong learners grounded in the Catholic faith that prepares our graduates to live God's…” Source: RevenueBase Database · checked Sep 19, 2026
18	Trinity High School	Strong evidence	Garfield Heights, OH, United StatesHQ checked Sep 19, 2026	51-200	207 contacts →
	Strong evidence “Trinity High School is a coeducational, Catholic school with a vibrant community of faith and learning, an innovative block schedule, unmatched emphasis on technology and a focus…” Source: RevenueBase Database · checked Sep 19, 2026
19	Benilde-St. Margaret's School	Partial evidence	St. Louis Park, MN, United StatesHQ checked Sep 19, 2026	51-200	199 contacts →
	Partial evidence “BSM's mission is to educate, empower, and inspire learners within a Catholic community to lead lives of faith, achieve academic excellence, and contribute meaningfully to a global…” Source: RevenueBase Database · checked Sep 19, 2026
20	John Paul II High School	Strong evidence	Plano, TX, United StatesHQ checked Sep 19, 2026	51-200	199 contacts →
	Strong evidence “Founded in 2005 and sponsored by the Diocese of Dallas, John Paul II High School (JPII) is the premier Catholic coeducational college-preparatory institution in Collin County…” Source: RevenueBase Database · checked Sep 19, 2026
21	Bishop O'connell High School	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 19, 2026	51-200	194 contacts →
	Indirect evidence “Bishop Denis J.” Source: RevenueBase Database · checked Sep 19, 2026
22	Sacred Heart Schools	Strong evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	51-200	192 contacts →
	Strong evidence “Sacred Heart Schools on Sheridan Road - the Academy of the Sacred Heart for Girls and Hardey Preparatory for Boys – are independent, Catholic, single-sex elementary schools…” Source: RevenueBase Database · checked Sep 19, 2026
23	Dowling Catholic High School	Strong evidence	West Des Moines, IA, United StatesHQ checked Sep 19, 2026	51-200	185 contacts →
	Strong evidence “Dowling Catholic High School is committed to serving the Greater Des Moines Catholic community and embracing learners of all faiths.” Source: RevenueBase Database · checked Sep 19, 2026
24	St. Dominic School	Indirect evidence	New Orleans, LA, United StatesHQ checked Sep 19, 2026	51-200	183 contacts →
	Indirect evidence “St.” Source: RevenueBase Database · checked Sep 19, 2026
25	Holy Family Catholic High School	Strong evidence	Victoria, MN, United StatesHQ checked Sep 19, 2026	51-200	177 contacts →
	Strong evidence “Holy Family Catholic High School is a co-educational high school committed to helping young men and women realize their academic and spiritual potential.” Source: RevenueBase Database · checked Sep 19, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: catholic secondary schools. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names catholic secondary schools.
Partial evidence: Its own public description names part of catholic secondary schools, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name catholic secondary schools. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 1,917 catholic secondary schools based in the United States

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Catholic secondary schools based in the United States at a glance

As of Sep 19, 2026

30.6%Verified-email coverage

23.5Average contacts per company

11-50Median size (employees)

2.1%Largest-city concentration · Chicago

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

328

11-50

760

51-200

717

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,917 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among catholic secondary schools, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “catholic secondary schools”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names catholic secondary schools), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among catholic secondary schools, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 13,785 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 19, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Catholic secondary schools by metro

Catholic secondary schools in Chicago41
Catholic secondary schools in New York31
Catholic secondary schools in Philadelphia27

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names catholic secondary schools, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many catholic secondary schools are there based in the United States?

RevenueBase identified 1,917 catholic secondary schools headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Notre Dame High School, headquartered in Los Angeles, tops this list with the largest team on record.

Which city has the most catholic secondary schools?

Chicago leads with 41 headquartered companies, followed by New York (31) and Philadelphia (27).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 13,785 verified decision-maker contacts tracked across these 1,917 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.