St Columba's Convent, Dalby, Heritage-listed religious building in Dalby, Australia.

St Columba's Convent is a brick and timber building on Cunningham Street with a distinctive triple-gabled façade, stained glass windows, and wide timber verandahs featuring cast iron decorations. The H-shaped structure contains multiple spaces including a chapel, refectory, and dormitory areas connected by a central section.

The building was designed in 1913 by architect George Bernard Roskell for the Sisters of Mercy and operated as their convent and school until 1990. The nuns shaped religious and educational life in the community for more than seven decades.

The convent shows how the Catholic Church shaped education in rural Queensland and served as a center for teaching and religious life. Visitors can see the chapel and classrooms that reflect the daily routines of the nuns and their students.

The former convent stands at 169 Cunningham Street, on the corner of Cunningham and Edward Streets, on land transferred to the Catholic Church in 1910. It is a heritage-listed building, so visitors should view it from the street rather than expect open access. The opening ceremony on 8 June 1913 drew around 500 visitors.

The convent opened on 8 June 1913, the eve of the feast day of St Columba of Iona, and about 500 visitors attended the ceremony. The name Iona refers to the Scottish island where Columba was exiled in 563 and later established his ministry.