m: John Benson who was born in Cattaraugus Co NY.
Almeda indicated in 1880 census that her father was born in Wales; he fought in Revolutionary War and was a prisoner for a time.

ch: Twelve -
-Lewis* (1825/IA),
-Minerva (1832/OH),
-Ursula S (1834/OH, m: Parker),
-Matilda E (1836-OH),
-Solon F (1840/IA),
-Sarah Elvira (1842/IA),
-Edwin E (1843/IA-abt 1865),
-Sidney R. (1844/IA-1926),
-Sylvia ?Sarah? (1848/IA, m: Linley),
-Horrace J (1850/IA),
-Almeda Effie (1855/IA, m: Swayne).
-The unnamed child may have been born bet 1825-1832 and out of home by the 1850 census. (*note: Lewis is unproved son but was single/head living next door to John & Almeda in 1850 census.)

Only Ursula, Matilda, Solon, Sidney, Sylvia, Horrace and Effie were listed with addresses in 1919 bio of Sidney; it is assumed the others died before 1919.

Buried at Grundy Co IA, per son, Sidney, 1919 biography. John and Almeda last lived in Delaware/Hardin counties, could be buried in one of those counties.

1919 History of Henry Co MO, Uel W. Lamkin, Historical Publishing Co pg 789
The family tree of the Benson family has its roots in the earliest history of our Nation, members of which have given their lives to evolve this great democratic Government. S. R. Benson was born in 1844 in Jackson County, Iowa, the son of John and Almeda (Green) Benson. John Benson and his wife were among the pioneers of Iowa, settling upon her broad prairies when men laughed at the mere possibility of it ever being an agricultural country. John Benson was born in 1796 in Cattaraugus County, New York, and his wife was born in Green County, New York, in 1810. Mrs. Almeda Green was the daughter of a Revolutionary soldier who was captured by the British and taken into Canada, a prisoner of war. He effected his escape and crossed the Niagara River back into his own country. For many days he was dependent upon nature for food, eating the berries and bark of the trees. Such privations were endured by the men who fought for liberty. John and Almeda (Green) Benson are both deceased and are buried in Grundy County, Iowa. They were the parents of twelve children: Ursula, married Edwin Parker in Hardin County, Iowa; Sylvia, wife of J. Linley, Bloomington, Illinois; Matilda, Bloomington, Illinois; Effie Swayne of Harding County, Iowa; Solon F., a banker of Pierson, Iowa; Horace J., lives in Kentucky, and S. R., the subject of this sketch. S. R. Benson was reared and educated in Delaware County, Iowa, where his parents lived for some time. In 1864, when only a lad of twenty and the fire of adventure burning high within his breast, he left the parental roof to explore the western lands.

1850 census Delaware Dist 7 IOWA: (note, very faint, ages not legible): BENSON John/54, Elmeda/49, Minirva/19, Eulala (Ursula)/17, Matilda/15, Salom/11, Sulrah E or Lulrah E (Sarah Elvira)/8, Edwin/6, Sidney/5, Sarah (Sylvia)/3, Harris (Horace)/1. Next door is BENSON, Lewis/25/IA, single - probably their son

1856 Census Iowa State Census Collection, Delhi, Delaware Co IA: BENSON: John/59, Almeda/46, Minirva S/24, Ursula S/23, Matelda E/20, Salou F/16, Sarah E/14, Edwin E/13, Sidney/11, Cylva/8, Corace J/6, Almeda E/1; HENDERSON
William H/24

1860 census Delaware-Delhi, IA: BENSON, John/63, Almeda/50, Minirva/28, Ursula/26, Chalida (Matilda)/24, Salom/20, Elvira/18, Edwin/17, Sidney/15, Sylvia/12, Horrace/10, Elfhie/5.

1870 census Union, Hardin Co IA: BENSON, Almeda/60/NY/Wd, Ursula/OH/37, Matilda E/35/OH/Bonnetmaker, Elvira/28/IA, Sylvia/22/IA/Bonnetmaker, H.J. (Horace)/20/IA/working in sawmill, A.E./15/IA.
Next door: BENSON, S.R./25/IA, Lucinda/20/IL and NEALE, Lizzie/18/VA/housekeeper - relationship, if any, unknown, Lucinda's maiden name was Griffin.

1880 census: Union, Hardin IA: BENSON Almeda/70/widow, Ursula L/45, Sarah (Elvira)/39.
1880 census, Colo, Story, IA: BENSON, S.R./30/Banker, Lou/28, Lettie/4/dau*, Charlie/2 and LEAN Addie/18/servant.
*Lester/4/son, is incorrectly entered in records as Lettie/4/dau. He appears as Lester/9/son in 1885 Colorado census and in Sidney's 1919 bio.