Company lists · Data refreshed September 2026
Top 25 Libraries based in the United States
The United States libraries directory contains 1,161 organizations, with 29,893 contacts and 11,001 email addresses, as of September 2026. New York is the single most-represented city among the companies on the list.
Libraries are organizations that collect, manage, preserve, and provide access to books, media, information resources, and related services. This list covers organizations that operate libraries or provide library-based collections, information access, research support, lending, archiving, or related services. Ranked by team size, largest first. Data current as of September 7, 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.
The 25 largest libraries based in the United States
Ranked by team size| # | Company | RevenueBase Smart Search | Contacts | ||
|---|---|---|---|---|---|
| 1 | Indirect evidence | 2,494 contacts → | |||
“The New York Public Library is a free provider of education and information for the people of New York and beyond.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 2 | Indirect evidence | 1,087 contacts → | |||
“Established in 1896, Brooklyn Public Library is the nation’s sixth largest public library system and currently has nearly active cardholders.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 3 | Indirect evidence | 812 contacts → | |||
“Queens Public Library is one of the largest and busiest public library systems in the United States, dedicated to serving the most ethnically and culturally diverse area in the…” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 4 | Indirect evidence | 714 contacts → | |||
“Since 1873, Chicago Public Library (CPL) has encouraged lifelong learning by welcoming all people and offering equal access to information, entertainment and knowledge through…” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 5 | Indirect evidence | 682 contacts → | |||
“KCLS Strategic Focus: We create opportunities by connecting people – individuals at all stages of life, families, communities and organizations – with: • Information and services…” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 6 | Indirect evidence | 671 contacts → | |||
“The Los Angeles Public Library provides free and easy access to information, ideas, books and technology that enrich, educate and empower every individual in our city's diverse…” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 7 | Indirect evidence | 599 contacts → | |||
“Cincinnati & Hamilton County Public Library has been cultivating curiosity from the moment we first opened our doors in 1853.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 8 | Indirect evidence | 536 contacts → | |||
“Our Vision Cleveland Public Library will be the driving force behind a powerful culture of learning that will inspire Clevelanders from all walks of life to continually learn…” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 9 | Indirect evidence | 520 contacts → | |||
“The Denver Public Library connects people with information, ideas and experiences to provide enjoyment, enrich lives and strengthen our community.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 10 | Strong evidence | 462 contacts → | |||
“Charlotte Mecklenburg Library is one of America’s leading urban public libraries, serving one of the country’s great emerging metropolitan areas in North Carolina.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 11 | Strong evidence | 447 contacts → | |||
“Library Systems & Services (LS & S) partners with local governments to operate public libraries and library systems.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 12 | Indirect evidence | 418 contacts → | |||
“The Indianapolis Public Library is the community's place to access essential information resources, technology, programs and services; foster reading and learning and promote the…” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 13 | Indirect evidence | 376 contacts → | |||
“Mid-Continent Public Library is the largest public library system in Missouri, serving nearly people in the greater Kansas City metropolitan area across Clay, Jackson, and Platte…” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 14 | Indirect evidence | 359 contacts → | |||
“Boston Public Library provides educational, cultural and civic enrichment, free to all, for the residents of Boston, Massachusetts and beyond, through its collections, services…” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 15 | Indirect evidence | 327 contacts → | |||
“Advancing knowledge.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 16 | Indirect evidence | 316 contacts → | |||
“Harris County Public Library (HCPL) provides information and resources to enrich lives and strengthen communities through innovative services within and beyond our walls.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 17 | Strong evidence | 313 contacts → | |||
“Sno-Isle Libraries serves residents across 2,260 square miles in Snohomish and Island county through 23 community libraries, online services, and Library on Wheels.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 18 | Indirect evidence | 282 contacts → | |||
“Awarded the National Medal in 2017 by the Institute of Museum and Library Services, Richland Library is a vibrant, contemporary organization that provides resources and…” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 19 | Indirect evidence | 281 contacts → | |||
“Enjoy a great book, program, event, or activity at your Toledo Library!” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 20 | Indirect evidence | 262 contacts → | |||
“Our mission: Enriching the community through lifelong learning and discovery.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 21 | Indirect evidence | 241 contacts → | |||
“The St.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 22 | Indirect evidence | 240 contacts → | |||
“Our vision is an empowered community where all people reach their potential.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 23 | Indirect evidence | 232 contacts → | |||
“Anne Arundel County Public Library (AACPL) expands life’s possibilities by sharing resources for knowledge, entertainment and community engagement.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 24 | Indirect evidence | 201 contacts → | |||
“Omaha Public Library is dedicated to empowering our communities by connecting people with ideas, information, resources, and innovative services.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 25 | Indirect evidence | 200 contacts → | |||
“The Oakland Public Library informs, inspires, and delights our diverse community as a resource for information, knowledge, and artistic and literary expression, providing the best…” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
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: libraries. 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 libraries.
- Partial evidence
- Its own public description names part of libraries, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name libraries. 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 1,161 libraries based in the United States
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Libraries based in the United States at a glance
As of Sep 7, 2026Companies by employee count
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
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 libraries, 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 “libraries”. 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 libraries), 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 libraries, 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, 11,001 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 7, 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.
Frequently asked
How many libraries are in the United States directory?
The directory contains 1,161 libraries and related organizations as of September 2026.
What contact data is available for libraries in the directory?
The directory includes 29,893 contacts and 11,001 email addresses for listed library organizations.
Which city has the most libraries in the directory?
New York is the single most-represented city among the companies on the list.
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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.
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