1900 Indiana, Marshall County, German township, Bremen town, ward 3, E.D. 77, sheet 11B, film T623-392
Montgomery Street, dwelling 231, family 248
Koontz, Charles E., head, white, male, Aug 1863, age 36, married 7 years, born Indiana, parents born Germany, druggist
----------, Elva, wife, white, female, Aug 1870, age 29, married 7 years, mother of 3 children, 3 living, born Indiana, father born Germany, mother born Ohio
----------, Sylvan E., son, white, male, Apr 1894, age 6, single, born Indiana, parents born Indiana
----------, Lester E., son white, male, May 1899, age 1, single, born Indiana, parents born Indiana
dwelling 230, family 247
Felden, Jacob H., head, white, male, Aug 1878, age 21, married 0 years, born Indiana, parents born Ohio, laborer box factory
---------, Bertha, wife, white, female, Aug 1876, age 23, married 0 years, mother of 1 child, 1 living, born Indiana, father born Germany, mother born Pennsylvania
---------, Hermina, daughter, white, female, Dec 1899, age 6/12, single, born Indiana, parents born Indiana

1910 Indiana, Marshall County, German Township, Bremen Town, ward 3, E.D. 106, sheet 10A, stamped page 131, film T624-370
Montgomery St., dwelling 107, family 214
Koontz, Charley E., head, male, white, age 48, married once for 17 years, born Indiana, parents born Germany, laborer at foundry
----------, Elva, wife, female, white, age 38, married once for 17 years, mother of four children, 4 living, born Indiana, father born Germany, mother born Ohio
----------, Syhrn, son, male, white, age 16, single, born Indiana, parents born Indiana
----------, Lester, son, male, whtie, age 10, single, born Indiana, parents born Indiana
----------, Marry, daughter, female, white, age 4, single, born Indiana, parents born Indiana

1920 Indiana, Marshall County, German Township, Bremen, ward 2, E.D. 173, sheet 4A, stamped page 115, film T625-456
Montgomery, dwelling 95, family 97
Koontz, Charles, head, male, white, age 54, married, born Indiana, parents born Germany, manager, telephone company
----------, Elva, wife, female, white, age 49, married, born Indiana, father born Germany, mother born Ohio
----------, Lester, son, male, white, age 20, single, born Indiana, parents born Indiana, laborer, telephone company
----------, Mary C., daughter, female, white, age 13, single, born Indiana, parents born Indiana

1930 California, Los Angeles County, Long Beach township, Long Beach, ward 6, E.D. 10-1094, sheet 9B, film T626-1094
405 West Third, dwelling 211, #4, family 516
Koontz, Charles E., head, male, white, age 66, married first at age 30, born Indiana, parents born Germany
----------, Elva J., wife, female, white, age 59, married first at age 23, born Indiana, father born Germany mother born Ohio
----------, Mary K., daughter, female, white, age 24, single, born Indiana, parents born Indiana, stenographer, lumber company

The Bremen Enquirer, 16 July 1953, page 1
Chas. E. Koontz, Near 90, Dies Of Heart Failure
Charles E. Koontz, dean of Bremen’s business men, who has been in failing health for several years, died of a heart attack in his home at 309 North Montgomery street Thursday at 1:45 p.m. He was observing his sixtieth wedding anniversary with Mrs. Koontz and the two were talking quietly with friends who had called, when the attack came. Mr. Koontz would have reached the age of ninety years next month.
Funeral services were held Sunday afternoon in First Evangelical Reformed church, Rev. J.M. Michael officiating. Burial was in Bremen cemetery where the Masonic lodge conducted graveside ceremonies.
Charles Edward Koontz, born Aug. 26, 1863, was the son of John and Catherine (Hans) Koontz. He grew to manhood and spent his entire life in Bremen. As a young man he became a registered pharmacist and with his brother, the late Frank J. Koontz, operated a drug store and established the local telephone company. Later their business enterprises were separated and Mr. Koontz took over the management of the telephone company, which he later reorganized into the Bremen Telephone Corporation. He was president of the corporation until the time of his death, but had been inactive for several years.
Mr. Koontz was identified with many civic and community enterprises. He served on the old Bremen school board several terms. As a young man he was a member of the old No. 4 Hose Company in the 1880’s and ‘90s when it held world records in firemen’s tournaments in Indiana and the midwest. He was a Past Chancellor and active member of the old Knights of Pythias lodge before its dissolution and was affiliated with Bremen Lodge No. 414, F &. A.M., the Scottish Rite and the Shrine. He was a member of the First Evangelical Reformed church.
He was married July 9, 1893, to Elvia Wahl of Bremen who survives, with one daughter, Mrs. Mary Catherine Hinkle of Long Beach, Cal., and a stepson, Roy Wahl of Eau Gallie, Forida [sic]. There are nine grandchildren and four great grandchildren.