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Largest Schools in St. Tammany Parish (2025)

Schools with the highest enrollment. Ranked by the Success Index (US) from official American data; 55 schools in St. Tammany Parish, Louisiana. Rank positions shown on each profile are within United States and Louisiana.

  1. 1
    87
    Mandeville High SchoolMandeville · Public HighEnrollment: 2,006
  2. 2
    70
    Slidell High SchoolSlidell · Public HighEnrollment: 1,654
  3. 3
    67
    Covington High SchoolCovington · Public HighEnrollment: 1,600
  4. 4
    81
    Northshore High SchoolSlidell · Public HighEnrollment: 1,518
  5. 5
    86
    Joseph B. Lancaster Elementary SchoolMadisonville · Public ElementaryEnrollment: 1,480
  6. 6
    83
    Fontainebleau High SchoolMandeville · Public HighEnrollment: 1,451
  7. 7
    64
    Salmen High SchoolSlidell · Public HighEnrollment: 1,091
  8. 8
    84
    Madisonville Elementary SchoolMadisonville · Public ElementaryEnrollment: 1,010
  9. 9
    66
    W.L. Abney ElementarySlidell · Public ElementaryEnrollment: 936
  10. 10
    83
    Little Oak Middle SchoolSlidell · Public MiddleEnrollment: 847
  11. 11
    78
    Lakeshore High SchoolMandeville · Public HighEnrollment: 835
  12. 12
    85
    Fontainebleau Junior High SchoolMandeville · Public MiddleEnrollment: 784
  13. 13
    68
    Pearl River High SchoolPearl River · Public HighEnrollment: 781
  14. 14
    77
    Henry Mayfield Elementary SchoolSlidell · Public ElementaryEnrollment: 749
  15. 15
    87
    Lee Road Junior High SchoolCovington · Public ElementaryEnrollment: 727
  16. 16
    70
    Slidell Junior High SchoolSlidell · Public MiddleEnrollment: 724
  17. 17
    69
    Pine View Middle SchoolCovington · Public MiddleEnrollment: 694
  18. 18
    61
    St. Tammany Junior High SchoolSlidell · Public MiddleEnrollment: 686
  19. 19
    91
    Tchefuncte Middle SchoolMandeville · Public MiddleEnrollment: 682
  20. 20
    80
    Bonne Ecole Elementary SchoolSlidell · Public ElementaryEnrollment: 651
  21. 21
    88
    Madisonville Junior High SchoolMadisonville · Public MiddleEnrollment: 647
  22. 22
    81
    Boyet Junior High SchoolSlidell · Public MiddleEnrollment: 644
  23. 23
    93
    Pontchartrain Elementary SchoolMandeville · Public ElementaryEnrollment: 636
  24. 24
    82
    E. E. Lyon Elementary SchoolCovington · Public ElementaryEnrollment: 628
  25. 25
    83
    Honey Island Elementary SchoolSlidell · Public ElementaryEnrollment: 607
  26. 26
    67
    Cypress Cove Elementary SchoolSlidell · Public ElementaryEnrollment: 593
  27. 27
    84
    Abita Springs Elementary SchoolAbita Springs · Public ElementaryEnrollment: 587
  28. 28
    90
    Lake Harbor Middle SchoolMandeville · Public MiddleEnrollment: 582
  29. 29
    81
    Covington Elementary SchoolCovington · Public ElementaryEnrollment: 551
  30. 30
    76
    Clearwood Junior High SchoolSlidell · Public MiddleEnrollment: 539
  31. 31
    93
    Mandeville Junior High SchoolMandeville · Public MiddleEnrollment: 510
  32. 32
    91
    Mandeville Elementary SchoolMandeville · Public ElementaryEnrollment: 508
  33. 33
    91
    Gayle Sloan Middle SchoolMandeville · Public MiddleEnrollment: 502
  34. 34
    86
    Folsom Elementary SchoolFolsom · Public ElementaryEnrollment: 453
  35. 35
    85
    Whispering Forest Elementary SchoolSlidell · Public ElementaryEnrollment: 453
  36. 36
    68
    Creekside Junior HighPearl River · Public MiddleEnrollment: 447
  37. 37
    93
    Woodlake Elementary SchoolMandeville · Public ElementaryEnrollment: 442
  38. 38
    85
    Fifth Ward Junior High SchoolBush · Public ElementaryEnrollment: 440
  39. 39
    69
    Florida Avenue Elementary SchoolSlidell · Public ElementaryEnrollment: 440
  40. 40
    82
    Abita Springs Middle SchoolAbita Springs · Public MiddleEnrollment: 435
  41. 41
    80
    Bayou Woods Elementary SchoolSlidell · Public ElementaryEnrollment: 431
  42. 42
    79
    Marigny Elementary SchoolMandeville · Public ElementaryEnrollment: 422
  43. 43
    83
    Riverside Elementary SchoolPearl River · Public ElementaryEnrollment: 420
  44. 44
    91
    Magnolia Trace Elementary SchoolMandeville · Public ElementaryEnrollment: 355
  45. 45
    91
    L.P. Monteleone Junior High SchoolMandeville · Public MiddleEnrollment: 349
  46. 46
    69
    Glynn H. Brock Elementary SchoolSlidell · Public ElementaryEnrollment: 345
  47. 47
    83
    Sixth Ward Elementary SchoolPearl River · Public ElementaryEnrollment: 335
  48. 48
    80
    Chahta-Ima Elementary SchoolLacombe · Public ElementaryEnrollment: 319
  49. 49
    68
    William Pitcher Junior High SchoolCovington · Public MiddleEnrollment: 266
  50. 50
    71
    Carolyn Park MiddleSlidell · Public MiddleEnrollment: 233
  51. 51
    45
    Abney Elementary Early Childhood CenterSlidell · Public ElementaryEnrollment: 233
  52. 52
    75
    Bayou Lacombe MiddleLacombe · Public MiddleEnrollment: 209
  53. 53
    72
    Alton Elementary SchoolSlidell · Public ElementaryEnrollment: 208
  54. 54
    81
    Folsom Junior High SchoolFolsom · Public MiddleEnrollment: 183
  55. 55
    63
    Little Pearl Elementary SchoolPearl River · Public ElementaryEnrollment: 98

Mandeville High School in Mandeville leads the 2025 list of largest schools in St. Tammany Parish with Enrollment 2,006. Of the 55 schools shown, 55 are public.

For the full picture see the wider Louisiana largest schools rankings, every school on the St. Tammany Parish page, or the comparison tool to put a shortlist side by side.

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Frequently asked questions

What is the best largest school in St. Tammany Parish?

Mandeville High School in Mandeville, Louisiana ranks first among largest schools in St. Tammany Parish with Enrollment 2,006 (Enrollment: 2,006).

How are largest schools in St. Tammany Parish ranked?

Schools with the highest enrollment. Only schools eligible for the Success Index (US) are included; the index is shown alongside for context.

Are these 2025 rankings official?

No. They are computed by Success Tutoring from official American data (Urban Institute Education Data Portal (NCES CCD, EDFacts); NCES Common Core of Data). States set their own assessments and proficiency cut scores, so proficiency rates are most comparable within a state. Use the state rankings for like-for-like comparisons.