| Death Date: | 14 May 1954 |
| Party: | Indian National Congress |
| Office: | 2nd Speaker of Karnataka Legislative Assembly |
| Term Start: | 18 June 1952 |
| Term End: | 14 May 1954 |
| Predecessor: | V. Venkatappa |
| Successor: | H. S. Rudrappa |
| Constituency: | Soraba-Shikaripur |
| Office1: | Minister for Revenue |
| Term Start1: | 25 October 1947 |
| Term End1: | 30 March 1952 |
| Constituency1: | Legislative Assembly not established |
| Office2: | Minister for Public Works Department |
| Term Start2: | 25 October 1947 |
| Term End2: | 30 March 1952 |
| Constituency2: | Legislative Assembly not established |
| Office3: | Member of the Mysore Legislative Assembly |
| Constituency3: | Soraba-Shikaripur |
| Term Start3: | April 1952 |
| Term End3: | 14 May 1954 |
| Predecessor3: | Legislative Assembly not established |
| Successor3: | Mallikarjunappa Gowda |
| Alongside3: | Ganga Nayak |
H. Siddaiah was an Indian politician from Indian state of Mysore, currently known as Karnataka.
He was the Minister of Mysore state for Public Works Department and Revenue department of Karnataka from 25 October 1947 to 30 March 1952 as part of the K. C. Reddy ministry. Later he became the Speaker of Mysore Legislative Assembly from 18 June 1952 and died on 14 May 1954 after winning 1952 Mysore State Legislative Assembly election for Soraba-Shikaripur.[1] [2] [3]