|Origin of name||Neptune, Roman god of waters and seas, for its location near Saw Mill Run|
|Water Street (until 1881)|
|Origin of name||Its location near Saw Mill Run|
This street appears as Water Street in the 1852 map of R. E. McGowin. The name referred to its location near Saw Mill Run. After Temperanceville was annexed into the city of Pittsburgh, the name conflicted with Water Street downtown (today Fort Pitt Boulevard), so it was renamed Neptune Street in 1881.
Bob Regan includes "Neptune" in a list of astronomy-related street names, implying that the street is named for the planet. However, it seems more likely that the name refers to the Roman god of waters and seas, maintaining the theme of the original street name.
- Water Street, for other streets that have had that name
- R. E. McGowin. Map of the Cities of Pittsburgh and Allegheny and of the Boroughs of South-Pittsburgh, Birmingham, East-Birmingham, Lawrenceville, Duquesne & Manchester etc. Schuchman & Haunlein, Pittsburgh, 1852. view source] mcgowin-1852 . [
- "An ordinance establishing the names of avenues, streets, lanes and alleys of the City of Pittsburgh." Pittsburgh city ordinance, 1881, no. 33. Passed Feb. 28, 1881; approved Mar. 4, 1881. Ordinance Book 5, p. 212. In Municipal Record: Minutes of the proceedings of the Select and Common Councils of the City of Pittsburgh, for the year 1880, pp. 213–234, Herald Printing Co., Pittsburgh, 1881 (Internet Archive pghmunicipalrecord1880). [view source] ordinance-1881-33
- Bob Regan. The Names of Pittsburgh: How the city, neighborhoods, streets, parks and more got their names, p. 68. The Local History Company, Pittsburgh, 2009, ISBN 978-0-9770429-7-5. [view source] regan