Lathrop, California. Lathrop is a city located in San Joaquin County, California, United States. At the 2010 census Lathropâs population was 18,023. The city is located in Northern California at the intersection of Interstate 5 and SR 120. Contents.
The lowest composite ACT score possible is 1, while the highest ACT score possible is 36. Other factors will help you determine what a good ACT composite score is for you, and weâll look at those in a minute.
The ACT score used in these calculations is the âCombined Highest Composite Score.â In other words, you donât even need to score a composite of 31 on one actual ACT test, you can use your best scores across sections of multiple tests.