Blue Earth County occupies a broad part of south-central Minnesota where Mankato anchors the northern urban area and smaller communities such as Eagle Lake, Lake Crystal, Mapleton, Madison Lake, and St. Clair are spread across a much larger rural landscape. The Minnesota River cuts a deep valley along the north, while the Blue Earth, Maple, Le Sueur, and Watonwan rivers divide the southern interior. Roads, rivers, and relief all change noticeably from the Mankato valley to the higher farm country. High-resolution map files are available for download in the section below.
This page combines a general county map, a six-city ranking index, a water map, and an elevation map with an actual range of roughly 228 to 363 meters. High-resolution A3 JPG originals for all four maps are available together in one ZIP for printing, classroom use, trip preparation, and side-by-side geographic comparison.
Table of Contents
Mankato at the junction of US-14, US-169, and regional highways
Mankato is the dominant settlement on the general county map. US-14 crosses the northern part of the county through Mankato, Eagle Lake, and the Madison Lake side, while US-169 runs south from the Mankato area through the western-central interior. The combination makes the county seat the clearest starting point for understanding both east–west and north–south travel.
MN-22 continues south from the Mankato–Eagle Lake side toward Mapleton, and MN-66 reaches Good Thunder through the central county. MN-60 serves the Lake Crystal side in the west, while MN-68 approaches Mankato from the southwest. St. Clair and Pemberton are associated with the MN-83 corridor in the east, and MN-30 crosses the far southern portion.
The smaller cities are not arranged in one continuous line. Lake Crystal sits west of Mankato, Madison Lake lies to the northeast, Mapleton is far to the southeast, and St. Clair occupies the east-central interior. Eagle Lake is much closer to Mankato and forms part of the county’s strongest northeastern development cluster.
Blue Earth County’s official profile describes Mankato as the county’s regional hub for education, health care, commerce, government, and other services. The map supports that role visually: the Mankato area has the largest continuous developed footprint, the densest road network, and direct access to the major Minnesota River valley.
A six-city index dominated by Mankato
The city index ranks six selected communities. Mankato is number 1 with a printed value of 45,473, followed by Eagle Lake at 3,281, Lake Crystal at 2,606, Mapleton at 1,728, Madison Lake at 1,322, and St. Clair at 710. These values are reproduced from the supplied city-index graphic and are not presented here as newly calculated population estimates.
Their locations show how widely the county’s smaller centers are dispersed. Mankato sits near the northern middle, Eagle Lake immediately to the east, Lake Crystal in the west, Madison Lake in the northeast, St. Clair farther east, and Mapleton in the southeast. Mankato’s printed value is much larger, but the rest of the county remains organized around several separate small towns.
There are no connector lines or mileage labels on this city map. It is a ranking and location graphic rather than a distance chart. Use it to compare where the six selected communities sit within the county, then refer to the general road map or a current routing service when actual driving mileage or travel time is needed.
Minnesota River valley and the rivers that feed it from the south
The Minnesota River is the strongest water feature on the map. It follows the northern county boundary, bends sharply around the Mankato area, and continues east through a deep valley. When the water and elevation maps are viewed together, this corridor stands out as one of the lowest and most continuous landforms in the county.
Several major rivers approach from the south. Watonwan River enters from the southwest, Blue Earth River runs north through the western-central county, and Maple River follows a separate northward course through the interior. Le Sueur River winds across the eastern half toward the Minnesota River system. Together they divide the southern farm country into a network of long river valleys rather than a single broad plain.
Big Cobb River and Little Cobb River are labeled in the southeast, and Perch Creek appears in the southwest near the Watonwan River side. Numerous smaller tributaries fill the spaces between the major channels. Their winding courses contrast sharply with the straighter road grid and make the county’s drainage pattern much more complex than the general map alone suggests.
The lakes are smaller but still important local references. Madison Lake, Eagle Lake, and Ballantyne Lake are clustered east and northeast of Mankato, while Lake Crystal and Loon Lake sit farther west. Lura Lake appears near the southern edge. These scattered basins add another water element beyond the large river valleys.
Blue Earth County’s official profile places the county in the Minnesota River Valley and highlights its extensive rivers, streams, agricultural land, wooded bluffs, parks, and trails. The county park system includes sites such as Bray Park at Madison Lake and Daly Park near Mapleton, providing a direct recreation connection to the lake and river landscapes visible on the maps.
Use the water map for names, relative positions, and broad drainage relationships. It does not show flood probability, legal shoreline limits, navigation depth, parcel ownership, or current water conditions. Those questions require current products from the responsible public agency.
Elevation from 228 to 363 meters
The elevation map reports an actual range of about 228 to 363 meters and a mean near 304 meters. Greens represent lower terrain, while tan and brown colors mark higher ground. The most obvious low corridor is the Minnesota River valley along the north, with especially deep relief around the Mankato area where several waterways converge.
South of the river valley, broad uplands cover much of the county. Blue Earth River and Maple River cut long lower corridors through this higher terrain, and the southern half includes a mix of rounded hills, wide interfluves, and narrow valleys rather than a completely flat surface. Higher patches are especially noticeable toward the southwest and southeast.
The northeast around Madison Lake and the eastern boundary also contains extensive high ground. Le Sueur River cuts through that elevated terrain on its way toward the Minnesota River, creating a distinct green valley between higher brown surfaces. Small tributaries east of Mankato produce similar but narrower low corridors.
The county-wide difference is roughly 135 meters. That is not mountain-scale relief, but it clearly separates the Minnesota River valley from the higher southern farm country and makes the major river cuts easy to recognize. This surface is intended for broad terrain comparison rather than survey-grade measurement; precise construction, drainage, engineering, or site work requires more detailed official elevation data and field verification.
How Mankato, Lake Crystal, and Mapleton occupy different settings
Mankato combines the county’s strongest road network with its deepest river setting. US-14 and US-169 provide major connections, the Minnesota and Blue Earth rivers meet nearby, and the elevation map shows steep valley relief surrounding the developed area. That mix makes Mankato unlike the broader agricultural interior.
Lake Crystal represents the western farm and lake country. The road network is simpler, Lake Crystal and Loon Lake provide local water references, and the Watonwan–Blue Earth river system cuts through higher surrounding land. Elevation is generally above the Minnesota River valley even though smaller stream corridors remain low.
Mapleton and St. Clair reveal a different eastern setting. MN-22 and MN-83 provide the main road references, while Maple River, Le Sueur River, and the Cobb river system carve long valleys across relatively high terrain. The contrast between these eastern uplands and the low northern river valley is one of the clearest reasons to compare all four maps together.
The map set works well for general county orientation, school assignments, local-history presentations, and trip preparation. It does not replace parcel records, zoning documents, flood-regulation products, legal surveys, or real-time transportation information, so specialized decisions should rely on current county, state, or federal sources.
Frequently Asked Questions
Which maps best show the river valley around Mankato?
Start with the water map to see the Minnesota and Blue Earth rivers, then compare the elevation map. The Mankato area sits inside one of the county’s deepest continuous valleys, which makes the surrounding uplands stand out clearly.
Are the city-index values current population estimates?
The values described here are the numbers printed in the supplied city-index graphic. For the latest population figures, use current U.S. Census Bureau or Blue Earth County statistics rather than treating the map values as a new estimate.
Can the 228–363 meter elevation range be used for engineering or surveying?
No. The elevation layer is suitable for broad comparison of higher and lower terrain, but precise construction, drainage, engineering, or survey work requires more detailed official elevation data and field verification.
Map File Information
A ZIP containing the high-resolution A3 JPG originals for the Blue Earth County map, city index, water map, and elevation map.
- Included Files: county map, city index map, water map, elevation map
- File Type: JPG
Related Maps
Sources and references
- U.S. Census Bureau TIGER/Line Shapefiles – official geographic files for county boundaries, roads, and place references.
- USGS National Hydrography – federal source for rivers, streams, lakes, and other hydrographic features.
- USGS 3D Elevation Program – official U.S. elevation and terrain data resources.
- Blue Earth County About Us – official county profile covering the Minnesota River Valley, communities, and local landscape.
- Blue Earth County Parks & Trails – official information about county parks, campgrounds, and trail resources.
Green Map creates custom-edited map images using open geographic data sources such as geoBoundaries, Natural Earth, OpenStreetMap, and government open data. These maps are edited visual materials, not raw data files, and are provided for education, documents, presentations, and graphic reference.
