Congregants still meet at the orignal Hillsborough Reformed Church at Millstone, one of the oldest churches in Hillsborough.
Along with Rev. Dr. Fred Mueller, a council of six elders and six deacons run the church. Services are held Sundays at 10am, with Sunday School classes meeting from 9 to 9:50 am.
The church has a choral ensemble, a women's choral ensemble, and adult, teenager and child bell choirs to accompany services. In addition to the main church building, the site has a rectory and a memorial hall.
The church participates in Habitat for Humanity programs and the Somerset Interfaith Hospitality Network, which provides food and shelter for Somerset County residents in need, and other outreach opportunities throughout the year.