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About ASN

About ASN

Assumption Sisters of Nairobi is a Religious Women Congregation Founded in 1953 in the Archdiocese of Nairobi – Kenya, by the then late Archbishop John Joseph McCarthy Cssp.
The congregation was founded in Thika, where the Mother House is located. The two formation houses are also located within the same area.
He was motivated by the sufferings of the local people especially women who at the time worked in the European Coffee Estates, the whole day. During his missionary journeys he encountered the sufferings that Mothers were exposed to during the child birth.
This moved him to found an African Congregation that would understand the women and empower them on various issues including education, hygiene and health. At that time there were only two Diocesan Congregations in the Country.
He requested the White Sisters (Missionaries of Africa) to assist in the formation of the first girls until the Congregation was stable. The Congregation started with 11 girls who took their first Vows in 1959. The Institute was granted Diocesan right on 2nd February 1955. The congregation has been on Diocesan right until May 27th 1998 when we were granted Pontifical Status.

The membership of the congregation stands at 200.  The number of communities stands at 50 distributed in 14 different Dioceses namely: Nairobi, Nakuru, Lodwar, Machakos, Kitui, Murang’a, Isiolo, Ngong, Eldoret, Njombe, Mombasa, Mandeville Diocese in Jamaica Prince Albert and Winnipeg Manitoba in Canada.  Each community is under a Local Superior.

Assumption Sisters of Nairobi is an Institute of African Religious Women under the Patronage of Mary Assumed into heaven, who are deeply rooted in Jesus Christ, and who have apostolic zeal for the service of the Church. By being immersed among the people as Life givers, they bring the Good News of Salvation in order to uplift the dignity of all people, especially women and with openness to the needs of time.

The congregation is organized into six zones namely; Nairobi/Rift Valley, Eastern, Thika, Lodwar, Jamaica and Canada.  Each zone is under a zonal co –ordinator.


It is headed by the Superior General Sr. Bernadette Munyao, ASN - Superior General Sr. Florence Muia, ASN - Assistant Superior General Sr. Anne Muiruri, ASN - Member of the General Council Sr. Irene Kariuki, ASN - Members of the General Council Sr. Sabina Mutisya, ASN - Member of the General Council

Sr. Maureen Nakhungu, ASN - General Bursar Sr. Mercy Florence Mwangi, ASN - Accountant

Sr. Juliana Kimanzi, ASN - Secretary General

The Assumption Sisters of Nairobi are to be witnesses of love and service reflecting the ministry of Christ where all people are respected.

To fulfill the mission of Christ through evangelization of all the nations and promote integral development where all people are dignified.

Love, Service and Self Sacrifice