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.
Each portion of the test is assigned a raw score which is then turned into a scale score. The composite and sub scores can range from 1 to 36. 1 is the lowest while 36 is the highest score that one can achieve. The national composite or total ACT score average is around 21.