ABSTRACTCampylobacteris a food-borne zoonotic pathogen that causes human gastroenteritis worldwide.Campylobacterbacteria are commensal in the intestines of many food production animals, including ducks and chickens. The objective of the study was to determine the prevalence ofCampylobacterspecies in domestic ducks, and the agar dilution method was used to determine resistance of the isolates to eight antibiotics. In addition, multilocus sequence typing (MLST) was performed to determine the sequence types (STs) of selectedCampylobacterisolates. Between May and September 2012, 58 duck farms were analyzed, and 56 (96.6%) were positive forCampylobacter. Among the isolates, 82.1% wereCampylobacter jejuni, 16.1% wereC. coli, and one was unidentified by PCR. Of the 46C. jejuniisolates, 87.0%, 10.9%, and 21.7% were resistant to ciprofloxacin, erythromycin, and azithromycin, respectively. Among theC. coliisolates, all 9 strains were resistant to ampicillin, and 77.8% and 33.3% were resistant to ciprofloxacin and azithromycin, respectively. The majority of theCampylobacterisolates were classified as multidrug resistant. Twenty-eight STs were identified, including 20 STs forC. jejuniand 8 STs forC. coli. The most common clonal complexes inC. jejuniwere the ST-21 complex and the ST-45 complex, while the ST-828 complex predominated inC. coli. The majority of isolates were of STs noted in ducks and humans from earlier studies, along with seven STs previously associated only with human disease. These STs overlapped between duck and human isolates, indicating thatCampylobacterisolates from ducks should be considered potential sources of human infection.