While minority groups posted increases, the total population in both Wilmette and Winnetka showed nominal decreases from a decade ago, according to preliminary 2010 Census data.

Wilmette’s total population declined to 27,087 in 2010, from 27,651 in 2000 — a 2 percent drop. In Winnetka, total population decreased to 12,187 last year, from 12,419 in 2000 — a 1.8 percent dip.

U.S. Census data revealed Tuesday also shows population breakdown by race. Both Wilmette and Winnetka saw steeper population declines in the number of white residents, but increases in other races.

Wilmette’s white population declined by 6.6 percent in the last decade, according to Census data, moving from 24,791 in 2000 to 23,148 in 2010. Winnetka’s white population dropped by 3.4 percent over the same period, from 11,958 in 2000 to 11,554 in 2010.

Wilmette’s Asian population saw a dramatic 29.4 percent increase — rising to 2,917 residents in 2010 from 2,255 in 2000, records show. African-American residents increased as well, to a smaller degree. In 2010, 215 residents in Wilmette said they were African-American, compared with 156 in 2000.

Hispanic residents increased in Wilmette, from 574 in 2000 to 902 in 2010.

All three groups made increases in Winnetka as well. The 2010 Census showed 403 Asian residents in Winnetka, compared with 302 in 2000. African-American residents increased by two over the decade — moving from 31 in 2000 to 33 last year.

The number of Hispanic Winnetkans increased from 108 in 2000 to 232 in 2010, according to Census data.

Total population in Glencoe and Kenilworth stayed relatively steady, data figures show. Glencoe’s population in 2010 was 8,763, compared with 8,762 in 2000. Kenilworth’s population increased — by 19 people — moving to 2,513 in 2010 from 2,494 a decade ago.