NAICS 611691:
Exam Preparation and Tutoring
This U.S. industry comprises establishments primarily engaged in offering preparation for standardized examinations and/or academic tutoring services.
Academic tutoring servicesLearning centers offering remedial coursesCollege board preparation centers+1 example
Professional examination review instruction
Also called: tutor, tutoring
Matching SIC code: 8299 Schools and Educational Services, Not Elsewhere Classified
Where it sits
- 61Educational ServicesSector
- 611Educational ServicesSubsector
- 6116Other Schools and InstructionIndustry group
- 61169All Other Schools and InstructionNAICS industry
- 611691Exam Preparation and TutoringNational industry
Largest companies with NAICS 611691
Updated Nov 9, 2026| Rank | Company | Headquarters | Employees |
|---|---|---|---|
| 1 |  Preplypreply.com | Brookline, US | 20K |
| 2 |  Kaplankaplan.com | Fort Lauderdale, US | 11K |
| 3 |  Kumon North America, Inc.kumon.com | Rutherford, US | 9.2K |
| 4 |  Mathnasium - The Math Learning Centermathnasium.com | Los Angeles, US | 6.7K |
| 5 |  Varsity Tutors, a Nerdy Companyvarsitytutors.com | St. Louis, US | 5.7K |
| 6 |  Sylvan Learningsylvanlearning.com | Bedford, US | 3.3K |
| 7 |  Huntington Learning Centerhuntingtonfranchise.com | Oradell, US | 3K |
| 8 |  Private Tutorprivatetutor.org | New York, US | 2K |
| 9 |  The Princeton Reviewprincetonreview.com | New York, US | 1.5K |
| 10 |  Russian School of Mathematicsmathschool.com | Newton, US | 1.4K |
Questions about NAICS 611691
What is the NAICS code for tutor?
NAICS 611691, Exam Preparation and Tutoring. This U.S.
Which businesses use NAICS 611691?
Academic tutoring services, learning centers offering remedial courses and college board preparation centers, and similar businesses in the Educational Services sector.
What SIC code matches NAICS 611691?
SIC 8299, Schools and Educational Services, Not Elsewhere Classified, from the US Census Bureau's concordance between the two systems.
How many companies have NAICS 611691?
11,388 companies with a website carry NAICS 611691 as their primary code in Crustdata's data, worldwide.
Find any company's NAICS codeType a company name or website and get its codes with their titles.
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Sign up freeCode titles, definitions, examples and SIC matches: NAICS 2022 and the Census concordances, US Census Bureau. Company counts and lists: Crustdata, companies with a website, each by its primary code, updated weekly. Employee counts are estimates.