Seeley, CA has a population of 1,626 and is the 12,245th largest city in the United States. The population density is 1,342 per sq mi which is 477% higher than the California average and 1381% higher than the national average. The median age in Seeley is 28 which is approximately 23% lower than the California average of 36. In Seeley, 51% of the population over 15 years of age are married, 20% speak English and 80% speak Spanish. 55% of Seeley residents were born in California, 6% were born out of state, 2% were born outside of the United States and 38% were foreign born.