St. Joseph Catholic Montessori School Photo - School Logo

Oldest Private High Schools in North Dakota

The average private high school in North Dakota was founded around 1955 (2025).
The oldest private high school in North Dakota is Oak Grove Lutheran School, founded in 1906.
Year Founded Range: 1906 1992 Avg. Year Founded: 1955

Oldest Private High Schools in North Dakota (2025)

School
Founding Date
Grades
Location
Rank: #11.
Oak Grove Lutheran School
Oak Grove Lutheran School Photo
(Evangelical Lutheran Church in America (formerly AELC, ALC, or LCA))
Founding Date: 1906
Grades: PK-12
124 North Terrace
Fargo, ND 58102
(701) 373-7101
Rank: #22.
St. Joseph Catholic Montessori School
St. Joseph Catholic Montessori School Photo - School Logo
Montessori School (Catholic)
Founding Date: 1913
Grades: PK-12
410 Collins Ave
Mandan, ND 58554
(701) 663-9563
Rank: #33.
Bishop Ryan Catholic School
(Catholic)
Founding Date: 1958
Grades: PK-12
316 11th Ave NW
Minot, ND 58703
(701) 838-3355
Rank: #44.
Dakota Adventist Academy
(Seventh Day Adventist)
Founding Date: 1977
Grades: 9-12
15905 Sheyenne Cir
Bismarck, ND 58503
(701) 258-9000
Rank: #55.
Founding Date: 1982
Grades: K-11
11008 Highway 23
Watford City, ND 58854
(701) 675-2359
Rank: #66.
Williston Trinity Christian School
Williston Trinity Christian School Photo
(Christian)
(2)
Founding Date: 1992
Grades: NS-12
2419 9th Ave W
Williston, ND 58801
(701) 774-9056

Frequently Asked Questions

What is the North Dakota average private high schools founding year?
The North Dakota average private high schools founding year is 1955 for 2025.
What are the private high schools with oldest founding year in North Dakota?
The top ranked private high schools in North Dakota include Oak Grove Lutheran School, St. Joseph Catholic Montessori School and Bishop Ryan Catholic School.

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