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Top 20 Best Union County Private Schools (2025)

For the 2025 school year, there are 90 private schools serving 14,059 students in Union County, NJ (there are 186 public schools, serving 102,682 public students). 12% of all K-12 students in Union County, NJ are educated in private schools (compared to the NJ state average of 14%).
The top ranked private schools in Union County, NJ include Oak Knoll School Of The Holy Child, Kent Place School, and Oak Knoll School of the Holy Child (Lower School).
The average tuition cost is $18,434, which is lower than the New Jersey private school average tuition cost of $18,887.
42% of private schools in Union County, NJ are religiously affiliated (most commonly Catholic and Jewish).

Top Ranked Union County Private Schools (2025)

School
Location
Grades
Students
Oak Knoll School Of The Holy Child
Oak Knoll School Of The Holy Child Photo
All-girls (Catholic)
(7)
44 Blackburn Road
Summit, NJ 07901
(908) 522-8100
Grades: 7-12
| 326 students
44 Blackburn Road
Summit, NJ 07901
(908) 522-8109
Grades: PK-6
| 178 students
American Boys Preparatory Academy
American Boys Preparatory Academy Photo - American Boys Prep student learning at his own pace.
All-boys | Alternative School
(1)
1020 Springfield Ave
Mountainside, NJ 07092
(908) 516-4231
Grades: 5-8
| 12 students
Cornerstone Day School
Special Education School
(7)
10-12 Commerce Drive
Cranford, NJ 07016
(908) 543-0220
Grades: 5-12
| 130 students
Bruriah High School For Girls
All-boys (Jewish)
35 North Avenue
Elizabeth, NJ 07208
(908) 355-4850
Grades: 7-12
| 350 students
Cornerstone School Of Summit
Cornerstone School Of Summit Photo - Our newly constructed playground
Daycare / Preschool
561 Springfield Ave
Summit, NJ 07901
(908) 277-4400
Grades: NS-PK
| 654 students
Five Points Y M C A
Daycare / Preschool (Christian)
201 Tucker Avenue
Union, NJ 07083
(908) 688-9622
Grades: PK-K
| 80 students
FlexSchool
FlexSchool Photo
Alternative School
(7)
34 Russo Place
Berkeley Heights, NJ 07922
(908) 322-0554
Grades: K-12
| 100 students
Holy Trinity School - Westfield
Holy Trinity School - Westfield Photo - 8th Graders Make Cards for Homebound Parishioners
(Catholic)
(3)
336 First St.
Westfield, NJ 07090
(908) 233-0484
Grades: PK-8
| 375 students
The Jardine Academy
Special Education School
373 Clermont Terrace
Union, NJ 07083
(908) 354-5800
Grades: NS
| 62 students
Jcc Of Central New Jersey
Daycare / Preschool (Jewish)
1391 Martine Ave
Scotch Plains, NJ 07076
(908) 889-8800
Grades: PK-K
| 240 students
330 Elmora Ave
Elizabeth, NJ 07208
(908) 355-4850
Grades: K-8
| 306 students
Kent Place School
All-girls
(2)
42 Norwood Avenue
Summit, NJ 07901
(908) 273-0900
Grades: PK-12
| 640 students
Kings Daughters Day School
Daycare / Preschool
(1)
502 West Front St
Plainfield, NJ 07060
(908) 756-7788
Grades: PK-K
| 153 students
Koinonia Academy
Koinonia Academy Photo - Koinonia Students have recreation on the school's beautiful 11 acre campus.
(Catholic)
(7)
1040 Plainfield Ave
Plainfield, NJ 07060
(908) 668-9883
Grades: PK-12
| 278 students
Oratory Preparatory School
All-boys (Catholic)
(3)
1 Beverly Rd
Summit, NJ 07901
(908) 273-1084
Grades: 7-12
| 376 students
Roselle Catholic High School
Roselle Catholic High School Photo
(Catholic)
350 Raritan Rd
Roselle, NJ 07203
(908) 245-2350
Grades: 9-12
| 354 students
St. John The Apostle School
(Catholic)
(1)
Valley Road
Clark, NJ 07066
(732) 388-1360
Grades: PK-8
| 405 students
St. John The Apostle School
(Catholic)
1805 Penbrook Ter
Linden, NJ 07036
(908) 486-6363
Grades: PK-8
| 439 students
St. Joseph The Carpenter School
(Catholic)
(1)
140 East 3rd Avenue
Roselle, NJ 07203
(908) 245-6560
Grades: PK-8
| 227 students
St. Michael Parish School
(Catholic)
1212 Kelly St
Union, NJ 07083
(908) 688-1063
Grades: PK-8
| 342 students
St. Michael School
(Catholic)
(9)
100 Alden St
Cranford, NJ 07016
(908) 276-9425
Grades: PK-8
| 320 students
St. Theresa Grade School
St. Theresa Grade School Photo - St. Theresa School 540 Washington Ave Kenilworth, NJ 07033 908 276-7220
(Catholic)
(1)
540 Washington Ave
Kenilworth, NJ 07033
(908) 276-7220
Grades: PK-8
| 313 students
St. Theresa Of The Child Jesus School
(Catholic)
(3)
705 Clinton Street
Linden, NJ 07036
(908) 862-1619
Grades: K-8
| 150 students
Temple Emanu-el Early Childhood Education Program
Daycare / Preschool (Jewish)
756 E Broad St
Westfield, NJ 07090
(908) 232-6770
Grades: PK-K
| 141 students
Trinity Temple Academy
Trinity Temple Academy Photo - Trinity Temple Academy (TTA) is a Seventh-day Adventist school for K through 8th grade scholars of ALL faiths and backgrounds. It is our mission to fully promote excellence in character development and academic achievement in a Christ-centered environment.
(Seventh Day Adventist)
(1)
1500 Maple Ave
Hillside, NJ 07205
(973) 923-7568
Grades: K-8
| 41 students
Union Catholic Regional High School
(Catholic)
1600 Martine Avenue
Scotch Plains, NJ 07076
(908) 889-1600
Grades: 9-12
| 740 students
The Academy of Our Lady of Peace
The Academy of Our Lady of Peace Photo
(Catholic)
99 South Street
New Providence, NJ 07974
(908) 464-8657
Grades: PK-8
| 212 students
Blessed Sacrament Elementary School
(Catholic)
1086 North Avenue
Elizabeth, NJ 07201
(908) 352-8629
Grades: PK-8
| 225 students
303 Chestnut Street
Roselle, NJ 07203
(908) 241-6470
Grades: PK-4
| 126 students
The Children's Academy
The Children's Academy Photo
Montessori School
(11)
37 Church Mall
Springfield, NJ 07081
(973) 379-3524
Grades: PK-K
| 58 students
Christian Children Institute
Daycare / Preschool (Christian)
Po Box 2852 350 Leland Ave
Plainfield, NJ 07062
(908) 756-7562
Grades: PK-K
| 30 students
Christopher Academy
Montessori School
1390 Terrill Rd
Scotch Plains, NJ 07076
(908) 233-7447
Grades: K-1
| 28 students
Christopher Academy
Montessori School
510 Hillcrest Avenue
Westfield, NJ 07090
(908) 233-7447
Grades: PK-1
| 95 students
Clark KinderCare
Daycare / Preschool
89 Terminal Ave.
Clark, NJ 07066
(732) 340-1900
Grades: NS-PK
| 34 students
Show 55 more private schools in Union County, NJ (out of 90 total schools)
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[+] Show Closed Private Schools in Union County, New Jersey

Union County Private Schools (Closed)

School
Location
Grades
Students
416 Linden Ave
Elizabeth, NJ 07202
(908) 352-4406
Grades: PK-8
| 175 students
840 N Broad St
Elizabeth, NJ 07208
(908) 352-0670
Grades: 9-12
| 127 students
225 N 8th St
Kenilworth, NJ 07033
(908) 276-7750
Grades: PK-K
| 20 students
970 Suburban Road
Union, NJ 07083
(908) 687-8415
Grades: PK-8
| 124 students
Holycross Christian Nursery School (Closed 2010)
Daycare / Preschool (Evangelical Lutheran Church in America (formerly AELC, ALC, or LCA))
639 Mountain Avenue
Springfield, NJ 07081
(973) 379-7160
Grades: PK-K
| 93 students
Little Lambs Preschool And Kindergarten (Closed 2020)
Daycare / Preschool (Lutheran Church Missouri Synod)
229 Cowperthwaite Place
Westfield, NJ 07090
(908) 232-1592
Grades: PK-K
| 12 students
Mcauley School (Closed 2010)
Special Education School
107 Westervelt Ave
Plainfield, NJ 07060
(908) 754-4114
Grades: Inquire with school
| 33 students
Messiah Lutheran School (Closed 2004)
(Lutheran Church Missouri Synod)
630 E Front Street
Plainfield, NJ 07060
(908) 755-8430
Grades: PK-2
| 51 students
227 Center St
Elizabeth, NJ 07202
(908) 352-7419
Grades: PK-8
| 167 students
1003 N Broad Street
Elizabeth, NJ 07208
(908) 352-8029
Grades: K-8
| 177 students
209 Princeton Rd
Elizabeth, NJ 07208
(908) 355-3355
Grades: PK-8
| 210 students
41 S Springfield Ave
Springfield, NJ 07081
(973) 376-5194
Grades: PK-8
| 159 students
101 Westervelt Avenue
Plainfield, NJ 07060
(908) 756-9539
Grades: K-8
| 155 students
237 S Broad St
Elizabeth, NJ 07202
(908) 352-4350
Grades: 9-12
| 184 students
1305 Saint George Ave
Roselle, NJ 07203
(908) 620-0404
Grades: K-4
| 28 students

Frequently Asked Questions

What are the top ranked private schools in Union County, NJ?
The top ranked private schools in Union County, NJ include Oak Knoll School Of The Holy Child, Kent Place School, and Oak Knoll School of the Holy Child (Lower School).
How many private schools are located in Union County?
90 private schools are located in Union County.
How much do private schools cost in Union County?
The average tuition cost is $18,434, which is lower than the New Jersey private school average tuition cost of $18,887.
How diverse are private schools in Union County?
Union County private schools are approximately 45% minority students, which is higher than the New Jersey private school average of 39%.
What percentage of students in Union County go to private school?
12% of all K-12 students in Union County are educated in private schools (compared to the NJ state average of 14%).
What percentage of private schools are religiously affiliated in Union County?
42% of private schools in Union County are religiously affiliated (most commonly Catholic and Jewish).
Which private schools in Union County are often viewed compared to one another?

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