Information related to home ranges of the nilgai antelope (Boselaphus tragocamelus) was needed to estimate spread of cattle-fever ticks (Riphicephalus microplus and R. annulatus) and to develop management protocols. We captured, placed telemetry collars on, and monitored 10 male and 12 female nilgai antelopes during February 2006–May 2008. We detected no difference between size of home ranges of males and females and determined maximum axes of home ranges of 16.3 and 13.8 km, respectively. The combination of large home ranges and large axes of home range indicates that if cattle-fever ticks are being maintained on nilgai antelopes, then the area in which these antelopes may spread ticks is great.