| Seattle Girls' School | |
| Established: | Fall 2001 |
| Type: | Private girls' middle school |
| Grades: | 5-8 |
| Head Of School: | Brenda Leaks |
| Faculty: | 18 |
| Staff: | 12 staff |
| Enrollment: | 105 |
| Colors: | Purple |
| Mascot: | Lynx |
| Location: | 2706 S. Jackson Street Seattle, Washington 98144 |
Seattle Girls' School is an all-girls middle school located in the central district of Seattle at South Jackson Street and MLK Way S. between 26th AVE S and 28th AVE S. Seattle Girls' School (also known as SGS) is an accredited member of the Northwest Association of Independent Schools and a full member of the National Association of Independent Schools.
In the 2011–2012 academic year, SGS enrolled 105 students. The student-teacher ratio is currently about 10:1, and the average class size 15. Tuition was $2,389 a school month in 2011-2012 totaling $21,500 for the school year.
Seattle Girls' School was founded by the board of trustees, a group of Seattle residents, in fall 2001. The school's current location at the corner of S. Jackson Street and MLK Way S was not completely finished when students for that year were being admitted, and the first open house was held in a gymnasium.
From the founding in 2001 to 2005 SGS accepted students through 6th and 7th grade. In the 2005-2006 year 5th grade and 8th grade was added.