Company lists · Data refreshed September 2026

Top 25 Independent high schools based in the United States

Name: Independent high 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 20, 2026 5,596 companies tracked

RevenueBase identified 5,596 independent high schools headquartered in the United States as of September 2026 and tracks 223,474 professional contacts across them, including 90,396 with verified work emails. New York is the largest hub.

This list covers independent high 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 20, 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 20, 2026 86% judged on-target in blind review

5,596Companies

223,474Contacts tracked

90,396Verified emails

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The 25 largest independent high schools based in the United States

Ranked by team size

Top 25 of 5,596 independent high schools based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to independent high 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	Charlotte-Mecklenburg Schools	Strong evidence	Charlotte, NC, United StatesHQ checked Sep 20, 2026	10001+	14,181 contacts →
	Strong evidence “The mission of Charlotte-Mecklenburg Schools is to create an innovative, inclusive, student-centered environment that supports the development of independent learners.” Source: RevenueBase Database · checked Sep 20, 2026
2	Idea Public Schools	Partial evidence	Weslaco, TX, United StatesHQ checked Sep 20, 2026	10001+	4,988 contacts →
	Partial evidence “IDEA Public Schools believes that each child can go to college.” Source: RevenueBase Database · checked Sep 20, 2026
3	Harmony Public Schools	Partial evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	1,001-5,000	2,933 contacts →
	Partial evidence “Harmony Public Schools is a network of PreK-12 college preparatory public charter schools across Texas.” Source: RevenueBase Database · checked Sep 20, 2026
4	Kipp Texas Public Schools	Partial evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	1,001-5,000	2,519 contacts →
	Partial evidence “KIPP Texas Public Schools is an open-enrollment, free public charter school network of 54 schools with more than Pre-K – 12 students across the state and an impact of 30 years in…” Source: RevenueBase Database · checked Sep 20, 2026
5	Uplift Education	Strong evidence	Dallas, TX, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,695 contacts →
	Strong evidence “Uplift Education (Uplift) is a 501(c)(3) nonprofit organization that operates a network of 45 high-performing, tuition-free, public charter schools serving students in…” Source: RevenueBase Database · checked Sep 20, 2026
6	International Leadership Of Texas	Partial evidence	Richardson, TX, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,316 contacts →
	Partial evidence “International Leadership of Texas (ILTexas) is a free, public charter school serving K-12 students across 26 campuses in the DFW, Houston, Liberty County, and College Station…” Source: RevenueBase Database · checked Sep 20, 2026
7	Santa Rosa County Public Schools	Partial evidence	Milton, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,191 contacts →
	Partial evidence “A family of educators that strives to provide a high quality education for all students through a comprehensive curriculum from pre-kindergarten through adult programs.” Source: RevenueBase Database · checked Sep 20, 2026
8	Aspire Public Schools	Partial evidence	Oakland, CA, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,147 contacts →
	Partial evidence “Aspire now has 36 community-based schools serving over students in California.” Source: RevenueBase Database · checked Sep 20, 2026
9	Responsive Education Solutions	Partial evidence	Lewisville, TX, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,103 contacts →
	Partial evidence “Our story began in 1998 when we, as a non-profit organization, were granted charters to open 15 dropout recovery and prevention schools.” Source: RevenueBase Database · checked Sep 20, 2026
10	Great Hearts Academies	Partial evidence	Phoenix, AZ, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,093 contacts →
	Partial evidence “Since its inception, Great Hearts has been on a mission to become a national leader in public charter schools.” Source: RevenueBase Database · checked Sep 20, 2026
11	Legacy Traditional Schools	Indirect evidence	Chandler, AZ, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,087 contacts →
	Indirect evidence “Ignite your desire to be the best!” Source: RevenueBase Database · checked Sep 20, 2026
12	Mastery Schools	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,031 contacts →
	Partial evidence “Mastery Charter Schools and Mastery Schools of Camden form a non-profit school network of charter, turnaround and renaissance schools in Philadelphia, PA and Camden, NJ, serving…” Source: RevenueBase Database · checked Sep 20, 2026
13	Basis ED	Partial evidence	Scottsdale, AZ, United StatesHQ checked Sep 20, 2026	1,001-5,000	928 contacts →
	Partial evidence “BASIS Charter Schools have been raising the level of American education to the highest international standards for more than 20 years, since our first school opened in 1998.” Source: RevenueBase Database · checked Sep 20, 2026
14	Kipp Foundation	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	n/a	878 contacts →
	Indirect evidence “Work Hard.” Source: RevenueBase Database · checked Sep 20, 2026
15	Plymouth-Canton Community Schools	Strong evidence	Plymouth, MI, United StatesHQ checked Sep 20, 2026	1,001-5,000	852 contacts →
	Strong evidence “Plymouth-Canton Community Schools operates 15 elementary schools, five middle schools, three high schools & an alternative high school program.” Source: RevenueBase Database · checked Sep 20, 2026
16	Noble Schools	Strong evidence	Chicago, IL, United StatesHQ checked Sep 20, 2026	1,001-5,000	836 contacts →
	Strong evidence “Noble is a nonprofit organization that runs 17 charter public high schools and one middle school in the city of Chicago.” Source: RevenueBase Database · checked Sep 20, 2026
17	Kipp Socal Public Schools	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 20, 2026	1,001-5,000	806 contacts →
	Partial evidence “KIPP SoCal Public Schools is a nonprofit organization that operates 24 tuition-free, open-enrollment charter public schools, within 20 Local Education Agencies, educating more…” Source: RevenueBase Database · checked Sep 20, 2026
18	Stratford School	Strong evidence	Campbell, CA, United StatesHQ checked Sep 20, 2026	1,001-5,000	773 contacts →
	Strong evidence “Stratford School, part of Spring Education Group, is a leading independent WASC-accredited private school in California offering courses from preschool through 12th grade with a…” Source: RevenueBase Database · checked Sep 20, 2026
19	Kipp NEW Jersey	Partial evidence	Newark, NJ, United StatesHQ checked Sep 20, 2026	501-1,000	764 contacts →
	Partial evidence “About KIPP New Jersey KIPP New Jersey is part of the nationally recognized “Knowledge Is Power Program” network of free, open-enrollment, college-preparatory public schools…” Source: RevenueBase Database · checked Sep 20, 2026
20	Accel Schools	Strong evidence	Cleveland, VA, United StatesHQ checked Sep 20, 2026	1,001-5,000	702 contacts →
	Strong evidence “We're a network of over 90 high-performing, public charter schools serving PK-12 students.” Source: RevenueBase Database · checked Sep 20, 2026
21	Friendship Public Charter School	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1,001-5,000	664 contacts →
	Partial evidence “Sign up to receive our Monthly Job Blast: http://tinyurl.com/jobblastsignup The mission of Friendship Public Charter School is to provide a world-class education that motivates…” Source: RevenueBase Database · checked Sep 20, 2026
22	Woodward Academy	Partial evidence	College Park, GA, United StatesHQ checked Sep 20, 2026	501-1,000	650 contacts →
	Partial evidence “From Pre-K to senior year, Woodward Academy is more than a school-it’s a launchpad for future global leaders.” Source: RevenueBase Database · checked Sep 20, 2026
23	Yuma Union High School District	Strong evidence	Yuma, United StatesHQ checked Sep 20, 2026	501-1,000	616 contacts →
	Strong evidence “Yuma Union High School District page” Source: RevenueBase Database · checked Sep 20, 2026
24	Francis Parker School Of Louisville	Strong evidence	Louisville, KY, United StatesHQ checked Sep 20, 2026	n/a	613 contacts →
	Strong evidence “Francis Parker School of Louisville is an Independent, Progressive school serving Preschool 2s – 12th grade students on two campuses in Louisville and Goshen, Kentucky.” Source: RevenueBase Database · checked Sep 20, 2026
25	St. John's School	Indirect evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	n/a	605 contacts →
	Indirect evidence “St.” Source: RevenueBase Database · checked Sep 20, 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: independent high 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 independent high schools.
Partial evidence: Its own public description names part of independent high schools, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name independent high 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 5,596 independent high schools based in the United States

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Independent high schools based in the United States at a glance

As of Sep 20, 2026

40.5%Verified-email coverage

39.9Average contacts per company

11-50Median size (employees)

1.9%Largest-city concentration · New York

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

1,342

11-50

1,804

51-200

1,837

201-500

384

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 5,596 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 independent high 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 “independent high 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 independent high 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 independent high 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, 90,396 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 20, 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.

Independent high schools by metro

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 independent high 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 independent high schools are there based in the United States?

RevenueBase identified 5,596 independent high 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?

Charlotte-Mecklenburg Schools, headquartered in Charlotte, tops this list with the largest team on record.

Which city has the most independent high schools?

New York leads with 105 headquartered companies, followed by Houston (88) and Los Angeles (66).

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 90,396 verified decision-maker contacts tracked across these 5,596 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 20, 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.