Could this be your Alcide LeBLANC (son of Joseph Leblanc and Clarisse TRAHAN)?

1910 US CENSUS
Police Jury Ward 3, Vermilion Parish, Louisiana
Series: T624 Roll: 533 Page: 108
April 15, 1920
LEBLANC, Alicde (head), m, w, 69, married 43 years, LA, LA, LA, farming, farm
LEBLANC, Eliza (wife), f, w, 64, married 43 years, 8 children, 7 living, LA, LA, LA, none
LEBLANC, Edeta (daughter), f, w, 42, single, LA, LA, LA, tending Poultry, farm
LEBLANC, Leonie (daughter), f, w, 40, single, LA, LA, LA, none
LEBLANC, Elie (son), m, w, 30, single, LA, LA, LA, farming, home farm
LEBLANC, Joseph (son), m, w, 25, single, LA, LA, LA, farming, home farm

1900 US CENSUS
Ward 3, Vermilion Parish, LA
Series: T623 Roll: 585 Page: 258
All north of Iberia and Vermilion R.R. to Bayou Vermilion, town of Abbeville, LA
June 6, 1900
LEBLANC, Alcide (head), w, m, March 1841, 59, married 34 years LA, LA, LA, Clerk of Court
LEBLANC, Eliza (wife), w, f, Oct 1845, 54, married 34 years, 8 children - 7 living, LA, LA, LA
LEBLANC, Editha (daughter), w, f, July 1867, 32, single, LA, LA, LA
LEBLANC, Neomie (daughter), w, f, Sept 1869, 30, single, LA, LA, LA
LEBLANC, Bernard (son), w, m, Dec 1870, 28, single, LA, LA, LA, Barber
LEBLANC, Eli (son), w, m, Jan 1879, 21, single, LA, LA, LA
LEBLANC, Joseph (son), w, m, July 1885, 14, single, LA, LA, LA, at school
TRAHAN, Rosa (servant), w, f, Feb 1887, 13, single, LA, LA, LA

1880 US CENSUS
Ward 1, Vermilion Parish, Louisiana
Dwelling 213/Family 213
June 25, 1880
LEBLANC, Alcide, , w, m, 40, farmer, LA, LA, LA
LEBLANC, Elisa, wife, w, f, 35, keeping house, LA, LA, LA
LEBLANC, Edita, daughter, w, f, 13, work in house, LA, LA, LA
LEBLANC, Leonie, daughter, w, f, 11, work in house, LA, LA, LA
LEBLANC, Bernard, son, w, m, 8, LA, LA, LA
LEBLANC, Gabriel, son, w, m, 6, LA, LA, LA
LEBLANC, Lucie, daughter, w, f, 3, LA, LA, LA
LEBLANC, Elie, son, w, m, 5/12 (Jan), LA, LA, LA
BOURQUER, Arestide, employee, w, m, 19, employee, LA, LA, LA

1870 US CENSUS
Abbeville P. O., Vermilion Parish, Louisiana
Series: M593 Roll: 534 Page: 156
June 1, 1870
DWELLING 24/FAMILY 21
LEBLANC, Alcide, 30, m, w, brickmaker, LA
LEBLANC, Eliza, 24, f, w, keeping house, LA
LEBLANC, Edita, 8, f, w, LA
LEBLANC, Leonie, 2, f, 2, LA

1860 US CENSUS
Abbeville P.O., Vermilion Parish, Louisiana
Series: M653 Roll: 426 Page: 714
DWELLING 261/Family 261
LEBLANC, Mrs. Joseph, 54, f, Farmer, LA
LEBLANC, Alcide, 19, m, Farmer, LA

NOTE: Mrs. Joseph LEBLANC = Clarisse TRAHAN

1850 US CENSUS
Ward 1, Wetern District Vermilion Parish, Louisiana
Series: M432 Roll: 241 Page: 409b
November 2, 1850
DWELLING 8/FAMILY 8
LEBLANC, Joseph, 48, m, planter, LA
TRAHAN, Clarisse, 42, f, LA
LEBLANC, Euphemie, 22, f, LA
LEBLANC, Severin, 18, m, LA
LEBLANC, Zelmire, 13, m, LA
LEBLANC, Perry, 12, m, LA
LEBLANC, Alcide, 10, m, LA
LEBLANC, Marguerite, 6, f, LA
LEBLANC, Ernest, 4, m, LA
LEBLANC, Columbus, 2, m, LA
LEBLANC, Desire, 21, m, LA