Here is a listing of all 27 games that Portsmouth HS has played in the OHSAA state tournament:
1925: Springfield 34, Portsmouth 21; Elite 8 state tournament first round
1926: Zanesville 42, Portsmouth 26; Elite 8 state tournament first round
1927: Portsmouth 19, Youngstown South 17; Dover 29, Portsmouth 24 (semifinal)
1929: Portsmouth 33, Canton McKinley 21; Dover 26, Portsmouth 14 (semifinal)
1931: Portsmouth 30, Toledo Waite 21; Portsmouth 16, Akron West 15; Portsmouth 20, Canton McKinley 19 OT (championship)
1934: Portsmouth 27, Columbus North 18; Portsmouth 23, Tiffin Columbian 18; Dayton Roosevelt 46, Portsmouth 30 (championship)
1939: Dayton Fairview 45, Portsmouth 32 Sweet 16 first round
1941: Lakewood 36, Portsmouth 35 Sweet 16 first round
1961: Portsmouth 54, Elyria 52; Portsmouth 50, Urbana 44 (championship)
1978: Portsmouth 59, Ottawa-Glandorf 43; Portsmouth 63, Cleveland Cathedral Latin 62 (championship)
1980: Portsmouth 65, Willard 53; Hamilton Ross 45, Portsmouth 44 (championship)
1988: Portsmouth 68, Mansfield Malabar 65; Portsmouth 54, Chesterland West Geauga 47 (championship)
1990: Portsmouth 65, Van Wert 58; Dayton Colonel White 71, Portsmouth 57 (championship)
2011: Cleveland Central Catholic 58, Portsmouth 47
2012: Portsmouth 74, Ottawa-Glandorf 66; Cincinnati Summit Country Day 53, Portsmouth 37 (championship)
Portsmouth has a very good 16-11 record overall in the state tournament; 12-7 in Final 4 play. The 27 games played in the state tournament ranks 1st in the SE district by a wide margin. Marietta has played in the 2nd most with 15, Glenford (no longer exists) played in 12, Wheelersburg has played in 8, while the Waterloo Wonders played in 7. Chillicothe and Ironton have only played in 4 state tournament games each.
The OHSAA state tournament began in 1923 with a Sweet 16 format. Starting in 1925, it was changed to an Elite 8 format and stayed that way until 1935. From 1936-1942 the format reverted back to a Sweet 16 format. After 1942, a Final 4 format was introduced, and has stayed that way since.