You've waited seven years unless you ordered a birth certificate from the Register of Deeds, Faulk Co., or from the state department of health. :-)
Here are the Faulk Co., SD, births for surname BENSON
Charles BENSON & Cora ENOS had Charles, b. 24 Dec. 1898, & Dorothee, b. 2 Feb. 1911.
James BENSON & Carolyn ENOS had Leon, 22 May 1896; James, 1 May 1898; Gaylon, 17 May 1902; & Edith, 30 June 1904.
William BENSON & Birdie WATERMAN had Maude, 19 Oct. 1899; Arthur, 10 June 1901; George, 6 Apr.1903; Bertha, 20 June 1908; & Ethel, 12 Mar. 1911.
Allisa & Melissa must have been nicknames because the birth record in Wisconsin has Birdie WATERMAN, b. 25 Feb. 1876. Census of 1900 has Mellisa, & Ancestry.com has Melissa Kate. However, other records including death record have Birdie BENSON (25 Feb. 1876, Wisconsin - 24 Mar. 1966, Long Beach, L. A., CA), mother's maiden name NEFF.
Some of the censuses have confusion about where Charles BENSON's father Henry was born, but several censuses for Henry say he was born in 1839, NY.
Census, 1850, Norfolk, St. Lawrence, NY, BENSON, William, 40, b. England; Fanny, 28, b. NY
Ch. b. NY: John, 14; Margaret, 13; Henry, 11; William, 6; Thomas, 5; Jonathan, 1; & George, 7.
Berea, Faulk Co., SD, 1900, BENSON / BINSON,
Charles, 31, b. MN, father b. NY, mother b. MI
Cora, 29, b. IA, father b. WI, mother b. VT
Ch. b. SD: Evelyn, Apr. 1893; Gladys, Jan. 1895; Pearl, Dec. 1896; son [Charles A.], Dec. 1898.
Next to BENSON, William, b. July 1863, MN NY MI; wf. Mellisa, b. Feb. 1877, WI WI OH
Willie A., b. Feb. '96; Frank H., Je. '97; Floyd, July '98; Maud M., Oct. '99.
Seneca, Faulk, SD, 1910, BENSON, Charles G., 41; Corra M., 39
B. SD: Evelyn G., 17; Gladys M., 15; Pearl C., 13; Adelbert C[harles], 11.
Potter Co., SD, 1920, BENSON
Cora, 49, wid; B. SD: Pearl, 23; C. Adelbert, 21; Dorothee, 8.
Pasadena, L. A., CA, 1930, HENION
Joseph H., 33, chiropractor, he & parents b. MI
Wf. Pearl C., 33, SD MI WI
Marjorie B., 8; Dale H., 1 y, 8 mo.
Sister-in-law Dorethee A. G. BENSON, 19, SD MI WI.
Darien, Walworth, WI, 1880, ENOS
William, 33, WI NY MA, wf. Lucy, 34, VT VT VT
B. Iowa: William, 11, & Cora, 9
B. WI: Archy, 6; Carry, 4; Pearl, 1.
--not my family