St. Mary's Catholic School
Diocesan school · Grades Pre-K–12
O'Neill, NE
300 N 4th St, O'Neill, NE 68763
Overall grade: B
ChooseAPrivateSchool.com grade, from official facts compared with similar schools.
- AClass size
- B+College-going
- BYears serving families
- B-Diversity
What stands out
- Smaller classes than 71% of Catholic schools in Nebraska
- Growing: enrollment up 71% since 2019–20
- One school from pre-K through 12th grade
St. Mary's Catholic School is a Catholic diocesan school in O'Neill, Nebraska, for students from pre-K through 12th grade. It has about 186 students and around 8 students per teacher, smaller classes than 71% of Catholic schools in Nebraska. Enrollment has grown about 71% since 2019–20. The school is part of the Archdiocese of Omaha. The school reports that about 75% of its graduates go on to four-year colleges. Students attend about 7 hours a day, 180 days a year.
At a glance
- Grades
- Grades Pre-K–12
- Students
- 186
- Teachers
- 22.3 (full-time equivalent)
- Students per teacher
- 8.3
- Boys and girls
- Coed · 81 girls, 105 boys
- Religious affiliation
- Catholic · Diocesan school
- Diocese
- Archdiocese of Omaha
- School day
- About 7 hours
- School year
- 180 days
- Graduates going to 4-year colleges
- About 75% (the school's estimate for the class before the survey)
- Library
- Yes
Reviews
Be the first to share what you love about St. Mary's Catholic School.
How it compares
- Smaller classes than 71% of Catholic schools in Nebraska (8 students per teacher).
- A smaller school: fewer students than 82% of Catholic schools in Nebraska.
- Compared with 17 Catholic schools in Nebraska.
Students by survey year
Total students reported in official records since 2019–20.
Students by grade
Student body
Questions to ask on a tour
- What is tuition, and what does it include (books, fees, uniforms, trips)?
- Do you offer financial aid, sibling discounts or payment plans?
- Do you accept ESA, voucher or tax-credit scholarship funds?
- How big are classes in my child's grade?
- What support is there for students who need extra help or more challenge?
- Is the school accredited, and by whom?
- What do a typical day and a typical week look like?
- How does the school communicate with families?
Questions about St. Mary's Catholic School
What grades does St. Mary's Catholic School serve?
St. Mary's Catholic School serves grades Pre-K–12.
How many students attend St. Mary's Catholic School?
About 186 students, with 8 students per teacher, according to official records.
How much is tuition at St. Mary's Catholic School?
Call the school to ask about tuition, financial aid and payment plans.
Official record · Updated October 2026 · Official search · Something wrong? Tell us
Other private schools nearby
St. Marys Schools
Parish school · Grades Pre-K–12
Smaller classes than 76% of Catholic schools in Nebraska
O'Neill, NE0.0 mi
Word of Life Christian School
Assembly of God school · Grades Pre-K–12
The only Christian school in O'Neill
O'Neill, NE1.4 mi