Castile and León - Population
| Date | Density | Male | Female | Population |
|---|---|---|---|---|
| December 1975 | 28 | 1,303,628 | 1,327,227 | 2,630,855 |
| June 1975 | 28 | 1,305,534 | 1,329,279 | 2,634,813 |
| December 1974 | 28 | 1,307,671 | 1,331,854 | 2,639,524 |
| June 1974 | 28 | 1,309,300 | 1,333,835 | 2,643,135 |
| December 1973 | 28 | 1,311,094 | 1,335,947 | 2,647,041 |
| June 1973 | 28 | 1,312,685 | 1,337,879 | 2,650,564 |
| December 1972 | 28 | 1,314,711 | 1,340,166 | 2,654,877 |
| June 1972 | 28 | 1,315,874 | 1,341,740 | 2,657,614 |
| December 1971 | 28 | 1,317,368 | 1,343,599 | 2,660,966 |
| June 1971 | 28 | 1,318,951 | 1,345,462 | 2,664,413 |
| December 1970 | 28 | 1,320,764 | 1,347,515 | 2,668,279 |