Sunday services at Third Congregational are held at 10 am (9am during July and August). It has a youth program for middle school and high school students with trips to state and national conferences, social opportunities and community-service projects.
There's a nursery program held during Sunday worship for infants to age 4 and a Sunday school open to students from pre-kindergarten to high school. Third Congregational also has regularly scheduled bible-study classes.
It also provides financial support to national and overseas missions and conducts local charity work.