The top 25 US communities with the highest percentage of people claiming Mexican ancestry are:[5] American television and film actress Jessica Alba is of Mexican American descent American television and film actress Jessica Alba is of Mexican American descent Anthony Quinn at the 40th Annual Emmy Awards Anthony Quinn at the 40th Annual Emmy Awards Rey Mysterio during his reign as WWE World Heavyweight Champion. Rey Mysterio during his reign as WWE World Heavyweight Champion.1. San Elizario, Texas 95.02% 2. Tornillo, Texas 94.78% 3. Lopezville, Texas 93.59% 4. Progreso, Texas 93.57% 5. Cameron Park, Texas 90.79% 6. Presidio, Texas 89.92% 7. Alton, Texas 89.62% 8. Hidalgo, Texas 89.43% 9. Cactus, Texas 89.40% 10. Penitas, Texas 89.37% 11. Palmview, Texas 89.16% 12. Roma, Texas 88.76% 13. Fort Hancock, Texas 88.21% 14. Calexico, California 87.72% 15. Somerton, Arizona 87.42% 16. Coachella, California 87.24% 17. Huron, California 86.92% 18. Parlier, California 86.42% 19. Lost Hills, California 86.27% 20. Mecca, California 85.65% 21. Heidelberg, Texas 85.31% 22. San Juan, Texas 84.54% 23. La Joya, Texas 83.92% 24. East Los Angeles, California 83.86% 25. San Joaquin, California 83.24%