Compared to the other cities in California and cities in all other U.S. states, how safe is Eureka, CA? From the gauges displayed above, you will notice that Eureka, CA has been ranked safer than 2% of other cities in the state of California. In addition, Eureka, CA is safer than 2% of cities in the entire United States. To achieve these results, all California and United States cities were analyzed to determine how many locations had a lower crime rate than Eureka, CA. By studying this data, it was possible to determine that Eureka, CA is below average in safety when compared with other United States cities.