Technical Abstract: Widespread implementation of precision agriculture practices requires low-cost, high-quality, georeferenced soil organic carbon (SOC) maps, but currently these maps require expensive sample collection and analysis. Widely available aerial imagery is a low-cost source of georeferenced data. After tillage, soils higher in organic carbon appear darker than surrounding soils in aerial imagery and this data could be used for mapping relative SOC differences within fields. The SSURGO soil survey data could be used to estimate the range of SOC for a specific field and then by combining these two data sources quantitative field maps of SOC could be developed. To test this, SSURGO was used to estimate the SOC range for two fields in central Iowa. Soil organic carbon content across each field was then linearly interpolated within the SSURGO estimated range for each field using the brightness values at each pixel in a bare-soil aerial photograph as a scaling factor. Measured SOC data from the two fields ranged from 3.4 to 50 g kg-1 and coefficients of determination between measured and estimated SOC concentrations were 0.72 and 0.75 with root mean square errors of 4.0 and 10.2 g kg-1, respectively. These coefficient of determination values were 0.39 and 0.26 higher, respectively, than those between SSURGO soil map unit SOC data and measured values. Measured SOC values and estimates based on aerial imagery and SSURGO data had similar distributions and their residuals were normally distributed, whereas SOC estimates based only on SSURGO data were not. These results imply that aerial imagery supplemented by SSURGO-estimated field SOC ranges can provide georefereced SOC estimates suitable for site-specific recommendations and analysis without field sampling.