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Colmar is a suburban unincorporated community located in Montgomery County, Pennsylvania along State Route 309 (Bethlehem Pike) just NE of Lansdale. The West Branch Neshaminy Creek forms its natural northern boundary and flows eastward into the Neshaminy Creek. It is located in Hatfield and Montgomery Townships. It is served by the North Penn School District and is part of the North Penn Valley region that is centered around the borough of Lansdale. Colmar is important to transportation in the northern Delaware Valley due to its location on 309 and having the Colmar station on the Lansdale/Doylestown Line of SEPTA Regional Rail. While Colmar has its own post office with the ZIP code of 18915, nearby areas use the Hatfield zip code of 19440 or the Lansdale zip code of 19446.