Pleasant Unity is an unincorporated community in a rural part of Unity Township, Westmoreland County, Pennsylvania, United States.. It is located at the junction of Pennsylvania Route 130 and Pennsylvania Route 981 6.3 miles (10.1 km) southeast of Greensburg.
Pleasant Unity has a post office with ZIP code 15676, which opened on November 2, 1825.. The area covered by this zip code has a population of 437.
The Jamison Coal and Coke Company operated an underground bituminous coal mine near Pleasant Unity during the period 1918 through the early 1960s. Known as Jamison No. 20, the mining complex was off Route 981, three miles north of the town. The company store was located on Route 981 at Phillips Street. The mine was served by the Unity Branch of the Pennsylvania Railroad. By 1940, it employed about 300 miners.