Mount Olivet Cemetery is a Catholic cemetery located at 10378 Military Road in Key West, Iowa
approximately 4 mi (6.4 km) south of Dubuque
. It is one of the two large Catholic cemeteries located in the Dubuque area. The cemetery is located near Saint Joseph's Catholic Church in Key West, but is operated independently.The cemetery offers in-ground burial, as well as columbarium and mausoleum entombment.
The cemetery began in 1856 and was known as the Key West Burying Ground.St Joseph's Chapel Mausoleum is located at the northwest corner of the cemetery. The mausoleum was built in 1989, and was later expanded.This building has crypts for mausoleum entombment, columbarium niches for cremated remains and a small chapel for the final committal ceremonies.