{Reference Type}: Journal Article {Title}: Alcohol and cannabis use and co-use among Whites and Hispanics on and off the U.S./Mexico border in California. {Author}: Caetano R;Vaeth PAC;Gruenewald PJ;Ponicki WR;Kaplan Z; {Journal}: J Ethn Subst Abuse {Volume}: 0 {Issue}: 0 {Year}: 2024 May 25 {Factor}: 1.331 {DOI}: 10.1080/15332640.2024.2354320 {Abstract}: This paper examines self-reported rates of drinking and cannabis use and co-use among White and Hispanic adults randomly selected in four counties in California: Imperial on the border; and Kern, Tulare, and Madera in California's Central Valley. Co-use was significantly higher among the U.S. born than among those born abroad, and in the Central Valley than on the border. Co-users were heavier drinkers, had higher rates of alcohol use disorder, other alcohol problems, and a positive history of illicit drug use than drinkers only.