Kansas Access and Support Center's Elevation data
Includes elevation data for the state of Kansas by county including LiDAR and 2 meter elevation mosaics, hillshades, and National Elevation Datasets.
National Elevation Dataset (USGS)
"The NED serves as the elevation layer of The National Map, and provides basic elevation information for earth science studies and mapping applications in the United States. Scientists and resource managers use NED data for global change research, hydrologic modeling, resource monitoring, mapping and visualization, and many other applications."
USGS Earth Explorer
1:250,000 and 1:100,000 Scale Land Use Land Cover (LULC) datasets are available for download. Includes Digital Elevation, Digital Line graphs, and LiDAR options as well as some satellite data.
USGS Earth Resources Observation and Science (EROS) Data Center
Access to aerial photographs, digital elevation models, digital raster graphics, satellite imagery, and land cover data.
US Interagency Elevation Inventory (USIEI)
Data and information from a variety of sources. Watch this USGS published video on How to use USIEI