#1 Best Private Middle Schools in Washington County, OR
St. Pius X School
Diocesan school · Grades K–8
Smaller classes than 95% of Catholic schools in Oregon
Portland, OR
A+Overall grade513 students8 students per teacher
2026 lists
Best Private Middle Schools in Washington County, OR
Private schools in Washington County, OR with middle-school grades and the highest overall grades. Top 22 of 22 schools.
#2 Best Private Middle Schools in Washington County, OR
Islamic School of Met/Oregon Islamic Academy
Islamic school · Grades Pre-K–12
Growing: enrollment up 74% since 2011–12
Tigard, OR
A+Overall grade226 students9 students per teacher
#3 Best Private Middle Schools in Washington County, OR
Catlin Gabel
Independent school · Grades Pre-K–12
One of the 3 largest independent schools in Oregon
Portland, OR
A+Overall grade763 students8 students per teacher
#4 Best Private Middle Schools in Washington County, OR
Westgate Christian School
Baptist school · Grades Pre-K–12
Smaller classes than 64% of Christian schools in Oregon
Tigard, OR
A+Overall grade126 students11 students per teacher
#5 Best Private Middle Schools in Washington County, OR
St. Matthew Catholic School
Diocesan school · Grades Pre-K–8
The only Catholic school in Hillsboro
Hillsboro, OR
A+Overall grade68 students9 students per teacher
#6 Best Private Middle Schools in Washington County, OR
Valley Catholic High School
Independent Catholic school · Grades K–12
The smallest classes of any Catholic school in Beaverton
Beaverton, OR
A+Overall grade1,006 students11 students per teacher
#7 Best Private Middle Schools in Washington County, OR
French International School of Oregon
Independent school · Grades Pre-K–8
One of the 3 largest independent schools in Oregon
Portland, OR
AOverall grade451 students7 students per teacher
#8 Best Private Middle Schools in Washington County, OR
Pilgrim Lutheran Christian School
Lutheran (Missouri Synod) school · Grades Pre-K–8
Serving families in Beaverton since at least 2011
Beaverton, OR
AOverall grade97 students11 students per teacher
#9 Best Private Middle Schools in Washington County, OR
Swallowtail School
Independent school · Grades Pre-K–8
Growing: enrollment up 39% since 2013–14
Cornelius, OR
AOverall grade118 students7 students per teacher
#10 Best Private Middle Schools in Washington County, OR
Forest Hills Lutheran Christian School
Diocesan school · Grades K–8
Serving families in Cornelius since at least 2011
Cornelius, OR
B+Overall grade167 students13 students per teacher
#11 Best Private Middle Schools in Washington County, OR
St. Francis School
Diocesan school · Grades Pre-K–8
The only Catholic school in Sherwood
Sherwood, OR
B+Overall grade170 students13 students per teacher
#12 Best Private Middle Schools in Washington County, OR
Visitation Catholic School
Parish school · Grades Pre-K–8
The only Catholic school in Forest Grove
Forest Grove, OR
B+Overall grade196 students15 students per teacher
#13 Best Private Middle Schools in Washington County, OR
Holy Trinity Catholic School
Diocesan school · Grades Pre-K–8
Serving families in Beaverton since at least 2011
Beaverton, OR
B+Overall grade258 students15 students per teacher
#14 Best Private Middle Schools in Washington County, OR
Faith Bible Christian School
Christian school (nondenominational) · Grades Pre-K–12
The only Christian school in Hillsboro
Hillsboro, OR
B+Overall grade479 students12 students per teacher
#15 Best Private Middle Schools in Washington County, OR
Catlin Gabel School
Independent school · Grades Pre-K–12
The largest of 67 independent schools in Oregon
Portland, OR
B+Overall grade767 students33 students per teacher
#16 Best Private Middle Schools in Washington County, OR
St. Cecilia School
Parish school · Grades Pre-K–8
Growing: enrollment up 27% since 2011–12
Beaverton, OR
BOverall grade283 students19 students per teacher
#17 Best Private Middle Schools in Washington County, OR
Valor Christian School International
Independent school · Grades Pre-K–12
The largest independent school in Beaverton
Beaverton, OR
BOverall grade294 students12 students per teacher
#18 Best Private Middle Schools in Washington County, OR
Life Christian School
Assembly of God school · Grades Pre-K–12
One school from pre-K through 12th grade
Aloha, OR
BOverall grade236 students17 students per teacher
#19 Best Private Middle Schools in Washington County, OR
St. Francis of Assisi School
Diocesan school · Grades Pre-K–8
Growing: enrollment up 38% since 2019–20
Banks, OR
B-Overall grade120 students19 students per teacher
#20 Best Private Middle Schools in Washington County, OR
Horizon Christian Elememtary/Middle School
Christian school (nondenominational) · Grades K–12
Growing: enrollment up 89% since 2011–12
Tualatin, OR
B-Overall grade629 students16 students per teacher
#21 Best Private Middle Schools in Washington County, OR
Horizon Christian School
Christian school (nondenominational) · Grades Pre-K–12
One of the 3 largest Christian schools in Oregon
Tualatin, OR
B-Overall grade644 students17 students per teacher
#22 Best Private Middle Schools in Washington County, OR
Southwest Christian School
Christian school (nondenominational) · Grades Pre-K–12
The largest Christian school in Beaverton
Beaverton, OR
B-Overall grade330 students16 students per teacher
Grades compare each school's official facts, such as class size, how long it has served families and where graduates go, with similar schools. They're a starting point: visit, ask questions and trust what you see.