Saint Mark Parish strives to provide mutual assistance in Christian life, witness, service, worship and formation in the Catholic Tradition.
— Mission Statement

In 1960 Bishop Treacy of the Diocese of LaCrosse established the parish under the patronage of Mark the Evangelist. Father Angelo Commoretto was the founding pastor. Initially Sunday liturgy was celebrated in the lower level of Saint Therese church and children attended classes at Saint Therese and Saint Mary schools.

On May 28, 1961 Bishop Treacy blessed the temporary building we use as the church today and ground was broken that day for the parish school. The Sisters of the Divine Savior of Milwaukee agreed to staff the school.

Approximately 900 households have registered their membership in the Catholic Church at the parish. On the parish staff are the pastor, deacon, director of religious education, coordinator of religious education, coordinator of adult enrichment, pastoral musician, coordinator of pastoral care, leader of prayer, school principal and a support staff.

30 catechists facilitate a 250 parish member catechetical program, the RCIA and adult formation.

The parish is associated with Newman Catholic Schools (NCS) of the parishes of the Wausau area. Preschool through grade 5 is housed at Saint Mark and Saints Anne and Michael Parishes, Child Development Centers at Saint Therese and Holy Name of Jesus Parishes. The Middle School at Saint Matthew Parish and Newman High School in Wausau house grades 6 through 8 and 9 through 12.