Laguna Beach High is actually is a pretty darn good school. I'm saying that the 92780 Tustin borders central Santa Ana. The 92782 borders Irvine and the foothills.
Homes in Tustin Ranch are much more expensive than the average Irvine home.
Other than that, it's a consensus among educators that socio-economics have a significant effect on school performance.
I think that all the following zip codes have better than average schools.
City
Zip
Income
Newport Coast
92657
$475,756.71
Corona Del Mar
92625
$280,317.01
Newport Beach
92660
$258,733.14
Newport Beach
92658
$237,335.66
Villa Park
92861
$209,376.76
Laguna Beach
92651
$205,514.54
Newport Beach
92661
$203,042.82
Surfside
90743
$190,692.95
Trabuco Canyon
92679
$166,016.54
Irvine
92603
$162,424.66
Newport Beach
92662
$148,500.30
Newport Beach
92663
$148,296.35
Irvine
92623
$123,654.85
San Juan Capistrano
92693
$120,910.86
San Clemente
92673
$113,793.17
Laguna Hills
92653
$113,668.73
Irvine
92618
$112,528.04
Yorba Linda
92887
$111,447.88
Tustin
92782
$109,949.44
Irvine
92614
$108,921.20
Sunset Beach
90742
$107,885.46
Fullerton
92838
$107,176.71
Newport Beach
92659
$106,261.94
Ladera Ranch
92694
$106,059.97
Dana Point
92629
$103,806.23
San Juan Capistrano
92675
$101,991.43
Laguna Niguel
92677
$101,644.82
Anaheim
92817
$100,574.74