Emmaus ( em-AY-əs) is a borough in Lehigh County, Pennsylvania, in the United States. It is located 5 miles (8.0 km) southwest of Allentown, Pennsylvania, in the Lehigh Valley region of the state. It is 50 miles (80 km) north of Philadelphia, Pennsylvania's largest city, and 20 miles (32 km) west of the Delaware River. Emmaus is located in the Allentown-Bethlehem-Easton, PA-NJ Metropolitan Statistical Area.
The population of Emmaus was 11,211 in 2010. The borough has been given many awards, including the Delaware Valley Green Building Council's Sustainable Community Award. In 2007 and 2009, Emmaus has been listed as one of the top 100 "Best Places to Live" in the United States by Money magazine.
According to the United States Census Bureau, the borough has a total area of 2.9 square miles (7.5 km2), all land, though part of the Little Lehigh Creek, a tributary of the Lehigh River, flows just outside the Emmaus border with Salisbury Township. Emmaus borders South Mountain, a large mountain range. The town's elevation is 436 feet above sea level. Emmaus is located at approximately 40°32′13″N 75°29′45″W.