The Orange County flag was officially adopted by the Orange County Board of Supervisors on Dec. 11, 1968. The design was selected in a contest of high school students held earlier that year. There were 80 entries. The winning entry (shown above) was by Laura Shernaman, an 11th grader at Fountain Valley High School. The flag was first flown at the opening of the new Orange County Courthouse on Jan. 10, 1969, at 3:00 p.m..
Note that the flag features a yellow sunburst surrounding the County emblem – an element that is often left out.
.
The circular emblem at the center of the flag (featuring three oranges, Old Saddleback, and rows of fields) has somewhat mysterious origins. The first usage I’ve heard of was in 1948, but there is no sign that it was ever officially adopted by the County. The official County seal remains a single orange with a stem and three leaves.
.
Below is another iteration of the County flag. It's interesting how many different shapes the yellow sunburst has taken over the years. Notice also that the text has changed from gold to white and that the mountains look less like Old Saddleback. It seems the flag's design drifts a bit over time.
