| Official Name: | Sigmund, Pennsylvania |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Pennsylvania#USA |
| Pushpin Map Caption: | Location of Sigmund in Pennsylvania |
| Subdivision Type: | Country |
| Subdivision Name: |  United States |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Lehigh |
| Subdivision Type3: | Township |
| Subdivision Name3: | Upper Milford |
| Population Metro: | 865,310 (US: 68th) |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 650 |
| Coordinates: | 40.473°N -75.559°W |
| Postal Code Type: | ZIP Code |
| Postal Code: | 18092 and 18062[1] |
| Area Code: | 610 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 1204651 |
| Blank1 Name: | Primary airport |
| Blank1 Info: | Lehigh Valley International Airport |
| Blank2 Name: | Major hospital |
| Blank2 Info: | Lehigh Valley Hospital–Cedar Crest |
| Blank3 Name: | School district |
| Blank3 Info: | East Penn |
Sigmund is an unincorporated community in Upper Milford Township in Lehigh County, Pennsylvania. Sigmund is located near Perkiomen Creek, a tributary of the Schuylkill River. It is a suburb of Allentown in the Lehigh Valley, which has a population of 861,899 and is the 68th-most populous metropolitan area in the U.S. as of the 2020 census.
A furnace was located in Sigmund in the early 1800s. The community was first named Hampton, and then Mary Ann, and then Sigmund Furnace prior to settling on Sigmund as its name.[2]
A settlement formed around a store in 1872.[3] That same year, a post office called "Sigmund" was established.[4] A school was erected in 1877, and a creamery and home were built in 1886.[5]
A meeting of the Hereford Literary Society in 1896 noted that "many new members had come in from Harlem, Sigmund and vicinity".[6] A stone house at the camp from 1871 was previously Sigmund's post office, general store, and hotel.
Sigmund Bible Camp opened in 1956 on 73acres of land.[7] The site contains a coal storage building, built prior to 1850, that provided fuel to a nearby iron furnace. It is now used as a church.[7] Two quarries and three lime kilns are also located on camp property.[7] A gym at the camp is open to the community, and is used by the Upper Milford Youth Association.[7]
Sigmund is served by East Penn School District. Emmaus High School serves grades nine through twelve. Eyer Middle School and Lower Macungie Middle School, both located in Macungie, serve grades six through eight.