Maryknoll Sisters of St. Dominic
Professional services
UnclaimedA Catholic religious congregation of women dedicated to overseas mission, humanitarian service, education, health care, and community development.
Last updated November 4, 2026
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Overview
The Maryknoll Sisters of St. Dominic are a Roman Catholic religious congregation of women whose central work is overseas mission and service. The institute was founded in 1912 in Ossining, Westchester County, New York, six months after the establishment of the Maryknoll community of missionary priests and brothers. Its original formal name was the Foreign Mission Sisters of St. Dominic, and the sisters were also known in their early years as Teresians. The congregation adopted its present name after becoming a pontifical institute in 1954. Members traditionally use the post-nominal initials MM. The congregation was established by Mary Josephine "Mollie" Rogers, later known as Mother Mary Joseph. A graduate of Smith College, Rogers sought to create an active women’s religious community oriented specifically toward foreign missions. Her model emphasized practical service, religious commitment, education, and direct engagement with communities rather than enclosure. An important formative influence came from the Dominican Sisters of Sinsinawa, whose religious tradition helped shape the new institute and its canonical recognition. The sisters began public missionary work in the United States before expanding abroad. In 1914, early members went to Los Angeles and Seattle to serve children of Japanese immigrants. The congregation then established missions in China in 1921 and Korea in 1922, marking the beginning of a sustained presence in East Asia. Its international work was disrupted by the Second World War. Several sisters were detained or deported, and two died during the wartime period. After the war, the congregation rebuilt and broadened its mission network, adding work in Latin America and responding to refugee and humanitarian needs in Central America, Africa, and other parts of Asia. Maryknoll Sisters have worked across a wide range of fields. Their ministries have included primary and secondary education, teacher training, health care, treatment of tuberculosis, agriculture, communications, social services, pastoral work, spiritual formation, refugee assistance, and community development. The congregation founded or helped establish schools in locations including Hong Kong, Hawaii, the Philippines, and Mexico. Some institutions later transferred to lay or diocesan administration, changed names, or developed into colleges and other educational organizations. A notable domestic project began in 1930, when the sisters purchased a tuberculosis sanatorium in Monrovia, California, at the invitation of Archbishop John Joseph Cantwell of Los Angeles. The facility served Asian tuberculosis patients in the archdiocese and was later replaced by a modern hospital. In the 1970s, the site was adapted as a residence for retired members. The congregation has continued to use its properties in ways connected to service and community life; part of the Monrovia site was later used by a local nonprofit for a tree nursery and community garden. The congregation’s identity is mission-centered rather than commercial. Its public-facing work is expressed through religious vocations, international ministries, education, health and social programs, advocacy, and care for vulnerable communities. In North Carolina, its ministries include Helping Hand Developmental Center for preschool children and St. Gerard House, which serves people affected by autism. The sisters also maintain a continuing presence in Hong Kong and other mission locations. The Maryknoll Sisters are associated with the memory of Maura Clarke and Ita Ford, two members killed in El Salvador in 1980 during the murders of four U.S. churchwomen. Their deaths became part of the congregation’s history and of the wider record of religious and humanitarian workers killed amid political violence in Central America. In 2012, the congregation placed 42 acres of its 67-acre Ossining campus under conservation easement, protecting native woodland and wetland areas. As of 2023, approximately 300 women were serving in 18 countries, although the size and distribution of the community may change over time.
History
The Maryknoll Sisters originated in the early twentieth-century American Catholic missionary movement. In 1912, Mary Josephine Rogers, a Massachusetts-born Smith College graduate who later became Mother Mary Joseph, founded a women’s community in Ossining, New York. The new institute was created specifically for foreign mission work at a time when Catholic missionary structures were largely organized around priests and male religious communities. Rogers envisioned an active congregation whose members would combine prayer and religious discipline with practical service, education, health care, and direct work among communities overseas. The congregation’s earliest activities were domestic. In 1914, members went to Los Angeles and Seattle to serve children of Japanese immigrants. That same year, Rogers traveled to Europe with benefactor Julia Ward, visiting Lourdes and Vatican City. The trip exposed Rogers to Catholic congregations organized explicitly for foreign missions and helped clarify the identity of the community she was building. The sisters’ religious formation was influenced by the Dominican Sisters of Sinsinawa, and in 1920 Patrick Joseph Hayes, archbishop of New York, gave the congregation canonical approval as a diocesan religious community. It was then formally known as the Foreign Mission Sisters of St. Dominic. International expansion began in East Asia. The sisters entered China in 1921 and Korea in 1922, establishing ministries in settings where education, health care, pastoral work, and social assistance were closely connected. Their overseas service was severely affected by the Second World War. Members were detained and deported from mission territories, and two sisters died. Despite these disruptions, the congregation resumed and expanded its work after the war. It developed missions in South America and became involved in assistance to refugees and displaced people in Central America, Africa, and Asia. The institute’s legal and ecclesial status changed in 1954, when it became a congregation of pontifical right. At that point it adopted the name Maryknoll Sisters of St. Dominic, linking it more clearly to the wider Maryknoll family of missionary priests, brothers, and lay workers. The congregation also produced religious education materials, including a 1950s children’s Bible-story series titled “Crusade,” reflecting its continuing interest in communications and catechetical work. Education became one of the congregation’s most visible long-term ministries. The sisters founded or helped operate schools in Hong Kong, Hawaii, the Philippines, Mexico, and other locations. Examples include Maryknoll Convent School in Kowloon, Maryknoll School in Honolulu, and institutions in the Philippines that later became Miriam College and Maryhill College. Some schools eventually passed to lay or diocesan management and adopted new names, but their histories preserve the sisters’ role in expanding Catholic education and women’s educational opportunities. Health and social service were equally important. In 1930, following an invitation from Los Angeles archbishop John Joseph Cantwell, the congregation purchased a tuberculosis sanatorium in Monrovia, California. The facility treated Asian tuberculosis patients within the Archdiocese of Los Angeles. It was later replaced by a modern hospital, and the campus was converted in the 1970s into a residence for retired sisters. In more recent decades, Maryknoll ministries have included developmental support for preschool children, autism-related services, community programs, agriculture, communications, spiritual formation, and assistance to migrants and refugees. The congregation’s history also includes the risks associated with mission work in politically unstable regions. Maura Clarke and Ita Ford were among four U.S. churchwomen murdered in El Salvador in 1980. Their deaths became a defining part of the modern memory of the Maryknoll Sisters and underscored the dangers faced by religious and humanitarian workers during Central America’s conflicts. In the twenty-first century, the Maryknoll Sisters have continued to operate as an international religious community while adapting to changing membership levels and local needs. Their ministries remain active in areas including Hong Kong, the United States, Africa, Asia, and Latin America. In 2012, the congregation placed 42 acres of its Ossining campus under conservation easement, protecting woodland and wetlands. By 2023, approximately 300 women were serving in 18 countries. The congregation’s present identity rests on the continuation of overseas mission, social engagement, education, health care, ecological stewardship, and solidarity with marginalized communities.
- 2023
International community reported in 18 countries
[1]Approximately 300 sisters were reported to be serving in 18 countries.
- 2012
Ossining conservation easement established
[1]The congregation protected 42 acres of its Ossining campus, including native woodland and wetlands.
- 1980
Maura Clarke and Ita Ford killed in El Salvador
[1]Maryknoll Sisters Maura Clarke and Ita Ford were among four U.S. churchwomen murdered in El Salvador.
- 1954
Becomes a pontifical institute
[1]The congregation received pontifical status and adopted the name Maryknoll Sisters of St. Dominic.
- 1930
Monrovia tuberculosis sanatorium acquired
[1]At the invitation of Los Angeles Archbishop John Joseph Cantwell, the congregation purchased a Monrovia, California, sanatorium for Asian tuberculosis patients.
- 1922
Mission established in Korea
[1]The sisters expanded their East Asian missionary work to Korea.
- 1921
Mission established in China
[1]The congregation began its early East Asian expansion with a mission in China.
- 1920
Receives diocesan canonical approval
[1]The archbishop of New York approved the community as a diocesan religious institute, then known as the Foreign Mission Sisters of St. Dominic.
- 1914
First domestic ministries begin
[1]Early sisters went to Los Angeles and Seattle to work with children of Japanese immigrants.
- 1912
Congregation founded in Ossining
[1]Mary Josephine Rogers founded the women’s missionary community in Ossining, New York.
Products and positioning
A women’s Catholic missionary congregation positioned around practical, international service and long-term community accompaniment. Its work combines religious ministry with education, health care, social services, communications, agriculture, advocacy, and human development.
Religious and humanitarian ministry · 1912
Overseas missionary service
The congregation’s central offering is not a commercial product but the service of its members in overseas missions. Sisters work with local communities through pastoral ministry, social assistance, refugee support, development programs, spiritual formation, and other forms of long-term accompaniment. The work has historically included East Asia, Latin America, Africa, and Central America.
Education · 1914
Educational ministries
Maryknoll Sisters have founded, staffed, or supported schools and teacher-training institutions in the United States, Hong Kong, the Philippines, Mexico, and elsewhere. Their educational work has ranged from primary schooling to secondary and higher education, often serving girls, immigrant communities, and populations with limited access to formal schooling. Several institutions later transferred to lay or diocesan administration.
Health care · 1930
Health-care ministries
Health work has included medical missions, public-health assistance, tuberculosis treatment, and care for underserved populations. The Monrovia sanatorium in California was a significant domestic example, while international missions incorporated health care into broader community and pastoral programs. The congregation’s members have also worked in social services and programs addressing disability and developmental needs.
Religious education publishing · 1950
Crusade Bible-story series
During the 1950s, the sisters produced a soft-cover series that retold Bible stories for Catholic children. The series reflected the congregation’s use of communications and educational media to support catechesis and religious formation.
Social services
Developmental and autism-support programs
In North Carolina, Maryknoll-related ministries include Helping Hand Developmental Center for preschool children and St. Gerard House for people affected by autism. These programs extend the congregation’s service model into specialized developmental support and family-oriented community care.
Brand decisions
2012
Conservation protection for Ossining campusOtherBackground
The congregation owned a 67-acre campus in Ossining containing woodland and wetland areas.
Action taken
It placed 42 acres under a conservation easement.
Aftermath
The easement preserved a substantial portion of the property’s natural habitat while the campus continued to support the congregation’s institutional life.
1954
Adoption of the Maryknoll Sisters of St. Dominic nameStrategyBackground
The congregation had previously operated as the Foreign Mission Sisters of St. Dominic and was also associated with the earlier Teresian name. Its elevation to pontifical status provided the occasion for adopting a name that more directly identified it with the broader Maryknoll missionary family.
Action taken
The institute became a congregation of pontifical right and changed its formal name to Maryknoll Sisters of St. Dominic.
Aftermath
The new name became the congregation’s principal identity while members continued to use the initials MM after their names.
Sources2 sources
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