Minnesota PLSS Converter — Section Township Range to GPS

Minnesota is surveyed under two principal meridians: the Fourth Principal Meridian, which governs the northern and northwestern parts of the state, and the Fifth Principal Meridian, which covers much of the south and west. The Fourth Principal Meridian's initial point was established in 1831 at the confluence of the Fox and Wisconsin Rivers in Illinois — one of the early anchor points for the expansion of the rectangular survey system into the upper Midwest. Its influence extends northward through Wisconsin and into Minnesota's lake country and Iron Range. The Fifth Principal Meridian, established in 1815 in Arkansas, extends its reach into the southern Minnesota plains where intensive grain farming transformed the landscape after the Civil War.

The boundary between the two meridian systems runs roughly northeast to southwest through the heart of the state, creating a zone where surveyors and title professionals must confirm which system applies before interpreting a legal description. In practice, descriptions from Minnesota's northern lake and forest counties almost always reference the Fourth Principal Meridian, while descriptions from the corn and soybean counties of the southern plains reference the Fifth. The Twin Cities metro area sits near the boundary, and some suburban counties have historical descriptions under both systems.

Minnesota's PLSS history is tied closely to its iron ore and timber industries. The Iron Range counties of St. Louis, Itasca, and Koochiching were surveyed in the 1870s and 1880s specifically to enable federal mineral patents for taconite and iron ore deposits. Timber surveys in the northern counties recorded government lots along the thousands of lakes that interrupt the rectangular grid, creating the complex shoreline parcel descriptions that dominate real estate transactions in resort communities today.