MapsPorter County maps . . . .
Porter County Township Plat Maps
Township plat maps are available from 1876, 1895, 1906, 1921, 1938, 1969, 1973, 1976, and 1988. Township plat maps can be viewed by either year or township.
| Plats by Year | Plats by Township |
| 1876 | Boone |
| 1895 | Center |
| 1906 | Essex |
| 1921 | Jackson |
| 1938 | Liberty |
| 1969 (name index) | Morgan |
| 1973 (name index) | Pine |
| 1976 (name index) | Pleasant |
| 1988 (name index) | Portage |
| Porter | |
| Union | |
| Washington | |
| Westchester |
Railroad Plat Maps of Porter County
The following files contain scanned images of the original railroad right-of-way plat maps within Porter County. Aside from their obvious historical significance, these maps are very useful in identifying parcel ownerships adjacent to the railroads. The original public documents are available for viewing at the Porter County Surveyor's Office. Note that most of these files are quite large and may take considerable time to load on slower Internet connections, such as dialup.
Baltimore & Ohio & Chicago Railroad (1918 plat)
Chesapeake & Ohio Railway (1916 plat)
Chesterton: East (1923 plat)
Elgin, Joliet & Eastern Railway: Crocker Station (1925 plat)
Elgin, Joliet & Eastern Railway: McCool Station (1924 plat)
Gary Railways: Garyton to Valparaiso (1939 plat)
Grand Trunk Western Railroad (1917 plat)
Lake Shore & Michigan Southern Railway (undated plat, after 1910)
Michigan Central Railroad (1916 plat)
New York, Chicago & St. Louis Railroad (1916 plat)
New York
Central Railroad (1927 plat)
Pittsburgh, Cincinnati, Chicago & St. Louis Railroad (1916 plat)
Pittsburgh, Fort Wayne & Chicago Railway (1916 plat)
Wabash
Railroad (1919 plat)
Porter County Geographic Information System (GIS)
The Porter County GIS Office, a unit of the Porter County Auditor's Department, provides online access to Porter County GIS information to the general public.
US Geological Survey, Porter County Topographical Maps
Topographical maps (7.5 minute series) prepared by the US Geological Survey that cover the entire area of Porter County are available on this website.