Petko Georgiev Mihaylov-Ogoyski was born in Ogoya village on 1 November 1929. He studied in his native village, started a high school education in the town of Svoge, moved to Sofia and graduated from the 5th Sofia Male High School in 1948. In 1949-1950 he was on compulsory military service, but in March 1950 he was arrested for the dissemination of political appeals. Ogoyski was sentenced to five years in prison for "enemy poems and conspiracy", and served the sentence in conditions of extreme in various prisons and in the First and Second Object of the Belene Forced Labor Camp on Persin Island. After his release in 1953, due to serving the sentence, considered in working days, he served his soldier service. As a former political prisoner, Ogoyski was allowed to work only in manual industrial jobs. He worked in agriculture, as a drilling worker at state enterprises, and construction painter.
In 1955 Petko G. Mihaylov-Ogoyski married Yagoda Petkova Danova-Yusova from the village of Chepintsi, in 1956 was born their first son Petko; in 1959 – their daughter Maria.
In this period Ogoyski began a history study at the Faculty of History and Philosophy at the Sofia State University, but his graduation was thwarted by his repeated condemnation of "enemy verses" and imprisonment in 1962. After the discharge from prison in 1963, he became a member and chairman of the literary club at the house-museum “Yavorov” in Sofia, which was purged in 1970 after two of its members, Ogoyski’s friends, escaped to the West.
In 1966, the third child of Petko and Yagoda Ogoyski – a son, Hristo, was born. In the 1970s and 1980s, Ogoyski was a painter and worked in a storehouse in which he became a “chief warehouse of paints and tools”. In his free time, he conducted local ethnographical research. Ogoyksi became a member of the Sofia regional literary society and of the Union of the Regional Ethnographers (kraevedi). Some of his texts critical of the regime were published in newspapers and magazines under pseudonyms such as Mitso Gitsin, Petko Murgashki, Dragoslav Bratski, Yaroslav Persinski.
After the collapse of the communist regime in 1989, Ogoyski was among the founding members of the restored Bulgarian Agrarian National Union “Nikola Petkov”, which became part of the Union of Democratic Forces, the main anti-communist coalition consisting of several political organizations. In 1990 Ogoyski was elected member of the Seventh Grand National Assembly of Bulgaria (from 10 July 1990 to 2 October 1991), which adopted the new Constitution of the Republic of Bulgaria. He also became a member of the Union of Bulgarian Writers and of the Bulgarian Historical Society. He was appointed as editor-in-chief of the newspaper "Zemedelsko zname" ["Agrarian Banner'], the daily newspaper of the re-established Bulgarian Agrarian National Union (BZNS) "Nikola Petkov" (1991-1993). Texts of Petko Ogoyski are included in the School Reader "Zabranenite pisateli" ["Banned Writers"], a joint publication of the Hannah Arendt Center, the Centre for European Studies and the Konrad-Adenauer-Stiftung in Sofia in 2013. In 2015 Petko Ogoyski, together with Bulgarian politicians (mayor of Sofia, Yordanka Fandakova; Bulgarian Ombudsman Konstantin Penchev), journalists (Georgi Koritarov), historians (Ivaylo Znepolski, Antonina Zhelyazkova, Valeri Todorov), the writer Georgi Gospodinov, and other public figures was honoured by the magazine “Zaman Bulgaria” for his “contribution to public peace and ethnic understanding in Bulgaria” - http://zaman.bg/bg/vzamanv-vratchi-edinstvenite-nagradi-za-prinos-kam-obshtestveniya-mir/
A biographical study is dedicated to Petko Ogoyski (Ivanova 2012); with a film about him in 2014, the documentary series of the Bulgarian National Television "Open Files" by the investigative journalist Hristo Hristov started.