M, b. October 1866
| Birth* | October 1866 | John C Barrett was born in October 1866 at Pennsylvania . |
| Marriage* | | He married Minnie Florence Millard, daughter of John B Millard and Mary E (?). |
| Census1900* | 14 June 1900 | John C Barrett and Minnie Florence Millard appeared on the 1900 Census of Huntington Twp, Luzerne County, Pennsylvania, enumerated 14 June 1900. Their children Ruth E and Mary A were listed as living with them. |
| Census1910* | 10 May 1910 | John C Barrett and Minnie Florence Millard appeared on the 1910 Census of Huntington Twp, Luzerne County, Pennsylvania, enumerated 10 May 1910. Their daughter Helen H was listed as living with them. |
| Census1920* | 22 January 1920 | John C Barrett and Minnie Florence Millard appeared on the 1920 Census of Huntington Twp, Luzerne County, Pennsylvania, enumerated 22 January 1920. Their daughter Helen H was listed as living with them. |