Growing immigration affects many communities across the United States, but the demographic impacts vary widely, with implications for service delivery. Some places have experienced high levels of immigration for decades and others are facing new influxes. In many communities, the mix of national origins of immigrants has been shifting. These changesincreasing numbers, geographic dispersion, and increasing diversityhave played out very differently across US communities and over time. In this brief, we provide examples of how national trends have played out in select US cities and neighborhoods. We then highlight the implications of these trends for effective service delivery.