| Location | Name | Established | Notes |
| Mountain View, CA | Khan Lab School | 2014 | |
| Danbury, CT | Hudson Country Montessori School | 1995 | |
| Greenwich, CT | Whitby School | 1958 | |
| Stamford, CT | The Children's School | 1965 | |
| Washington, D.C. | Latin American Montessori Bilingual Public Charter School | 2001 | |
| Washington, D.C. | Parkmont School | 1972 | |
| Wilmington, DE | Wilmington Montessori School | 1964 | |
| Hollywood, FL | Beachside Montessori Village | | |
| Plantation, FL | Blake School | | |
| Sandy Springs, GA | Springmont | 1963 | |
| Crest Hill, IL | Joliet Montessori School | | |
| Louisville, KY | Montessori School of Louisville | 2006 | |
| Cambridge, MA | Cambridge Montessori School | 1963 | |
| Cambridge, MA | John M. Tobin Montessori School | 1971 | |
| Milton, MA | Thacher Montessori School | 1971 | |
Chevy Chase and
Kensington, MD | Oneness-Family School | 1988 | |
| Fort Washington, MD | Fort Washington Montessori School, a Beddow School | | |
| Silver Spring, MD | Barrie School | 1932 | |
| Waldorf, MD | Waldorf Montessori School, a Beddow School | | |
| Kalamazoo, MI | Northglade Montessori Magnet School | 2001 | |
| Midland, MI | Midland Montessori School | 1971 | |
| Chesterfield, MO | The Fulton School | 1962 | |
| Saint Paul, MN | Great River Charter Montessori School | | |
| Carlsbad, NM | Jefferson Montessori Academy | 2002 | |
| New Rochelle, NY | Hudson Country Montessori School | 1972 | |
| New York City, NY | Caedmon School | 1962 | |
| Yonkers, NY | Yonkers Montessori Academy | | |
| Cincinnati, OH | Clark Montessori High School | 1994 | |
| Cincinnati, OH | Gamble Montessori High School | 2005 | |
| Cincinnati, OH | The New School Montessori | | |
| Cleveland Heights, OH | Ruffing Montessori | 1959 | |
| Portland, OR | Franciscan Montessori Earth School & Saint Francis Academy | | |
| Media, PA | The Walden School | 1967 | |
| Anderson, SC | Montessori School of Anderson | 1973 | |
| Louisville, TN | New Horizon Montessori School | 1978 | |
| Louisville, TN | Montessori Middle School | 2008 | |
| Austin, TX | Headwaters School | 2002 | |
| Dallas, TX | Alcuin School | 1964 | |
| El Paso, TX | Montessori Learning Center | 1999 | |
| Houston, TX | Baker Montessori School | 1925 | |
| Houston, TX | School of the Woods | 1962 | |
| Houston, TX | St. Catherine's Montessori School | 1966 | |
| Milwaukee, WI | MacDowell Montessori School | 2009 | |