The City of St. Peters has 20 parks covering about 1,000 acres of land. Outdoor amenities available to park users include: recreation trails, playgrounds, picnic shelters and pavilions, athletic fields, fishing ponds, and landscape areas.

Old Town Park at 1 Park Street  is St. Peters' original park. More than100 years old, this park is still a favorite of the community, offering two ball diamonds, four horseshoe pits, two pavilions and a playground. Old Town Park is also home to the annual St. Peters Olde Tyme Picnic.