Findings show that immigration had negligible or trivial effects on overall levels of homicide offending across census place localities in California. Immigration effects also tended to be small when the overall rates were disaggregated to allow for comparisons across racial/ethnic groups; immigration had a negligible positive effect on Latino homicide offending as compared to a small negative effect on White and Black offending levels; and the negative effect of immigration on Black homicide was noteworthy in light of concerns that increased immigration may contribute to Black unemployment and crime.Data were collected from information on total and race-disaggregated homicide arrests drawn from California's crime reporting program, and U.S. Census data from 2000 were used to generate information on immigration patterns and social and economic characteristics of the total, White, Black, and Latino populations. Tables, notes, and references