Weldon, CA has a population of 2,691 and is the 9,382nd largest city in the United States. The population density is 101 per sq mi which is 57% lower than the California average and 11% higher than the national average. The median age in Weldon is 53 which is approximately 48% higher than the California average of 36. In Weldon, 61% of the population over 15 years of age are married, 95% speak English and 5% speak Spanish. 68% of Weldon residents were born in California, 31% were born out of state, 0% were born outside of the United States and 1% were foreign born.