Bunts of wheat have been a serious threat to wheat before the advent of effective fungicides. With the increase in organic crop acreage, bunt diseases re-emerge as relevant wheat diseases. The major bunt pathogens in Europe are Tilletia tritici and Tilletia laevis causing common bunt and Tilletia controversa causing dwarf bunt. Infested wheat crops display varying levels of yield losses and quality losses due to the fishy odor of bunt spores. Most current wheat cultivars are susceptible to bunt. Resistance to bunt diseases is therefore of increasing relevance, particularly for low-input wheat production. We evaluated three RIL mapping populations for bunt resistance. Three resistant parents: Bonneville, Blizzard, and line PI119333 were crossed to the susceptible Austrian cultivar Rainer to generate three RIL populations. The mapping populations were evaluated in nurseries inoculated with either common bunt or dwarf bunt, using local spore mixes during 2-3 seasons. Bunt severity was determined as percentage of bunted spikes within a plot. Phenotypic data collected were highly informative with broad sense heritabilities of 0.94-0.98 and 0.83-0.85 for common bunt and dwarf bunt severity, respectively. High density genotyping of all parental and RI lines was performed using a 15K Illumina SNP array. Marker data were used for linkage map construction and QTL mapping. Both large effect and small effect QTL were detected. Blizzard and Bonneville share a large effect QTL for common bunt and dwarf bunt resistance on chromosome 1A, and a large effect QTL for common bunt resistance on 1B. Several small effect QTL for dwarf bunt resistance mapped to 2D, 7A and 7B. The Bt12 donor line PI119333 was tested for common bunt resistance only and possesses a large effect QTL on 7D and a small effect QTL on 4B. In summary, several large effect alleles for resistance to dwarf bunt and/or common bunt were detected and mapped. These are promising targets for marker assisted selection and rapid introgression of bunt resistance into locally adapted wheat cultivars.