Welcome to the San Ysidro Demographics page.  Here you will find information about the San Ysidro population broken down by age group.  You will also find data about the number of households in San Ysidro and the median age of residents.  The Temperature graph below identifies which months have the highest and lowest temperature in San Ysidro.  The Weather Risk graph provides an estimate of the risk certain weather-related events occurring in San Ysidro as compared to the national average.  These weather-related events include: hurricane, earthquake, tornado, wind, hail and severe weather.  The San Ysidro Employment and Finance graphs provide information about two areas. The Employment graph presents data about the percentage of workers in San Ysidro who are employed in occupations commonly classified as “white collar” or “blue collar.” The Finance graph presents data showing the percentage of San Ysidro households at various income levels, as well as the median household income of San Ysidro residents. The Crime Index suggests the risk of certain types of crime occurring in San Ysidro as compared to the national average.