Palo Alto's K-12 school enrollment shattered the 12,000 mark in new figures released Thursday.
This fall's student headcount is up nearly 3 percent over last year, with the bulk of the growth coming in the primary grades.
Ethnically, the district's Asian and Latino makeup increased, while the percentage of students who are Caucasian dropped from 52.3 percent to 50.7 percent.
African-American enrollment held steady in the low 3 percentage points.
The new figures are based on classroom attendance data traditionally taken on the 11th day of the school year – in this case, Sept. 8.
They become the district's official numbers for the 2010-2011 school year, and will be presented in a report to the Board of Education in a meeting Tuesday, Oct. 12.
The new numbers extend a 20-year upward trajectory in Palo Alto school enrollment, which hit a post-Baby Boom low of 7,452 in 1989-1990.
Enrollment peaked in 1967-1968 at 15,575.
This year's elementary-level growth exceeded high-end demographic projections.
At the middle- and high-school levels, this fall's numbers fell between low and medium-range projections.
The school district contracts with Lapkoff & Gobalet Demographic Research Inc. to help forecast enrollment trends.