The first Jimna Post Office opened on 1 July 1868 and closed in 1879. A receiving office was open from 1891 to 1909, and from 1925 until the second Jimna Post Office opened on 1 July 1927. This closed in 1981.
Monsildale Provisional School opened on 2 June 1913. In 1923, the school was moved and renamed Foxlowe Provisional School. On 25 June 1926 it was renamed Jimna Provisional School. On 1 October 1934, it was upgraded to a State School. It was mothballed at the end of 2006 and closed on 31 December 2009. (In about 1941, a separate Monsildale State School was opened but closed about 1961.)
The state government established a hoop pine nursery at Jimna in 1935. Jimna hall was opened in 1934 and the school, still in use today, was opened the same year When sawmilling contracted in the mid 1970s the town's population reduced significantly.
Jimna has a number of heritage-listed sites, including:
- "Jimna (town) (entry 17229)". Queensland Place Names. Queensland Government. Retrieved 7 June 2014.
- "Jimna (locality) (entry 44876)". Queensland Place Names. Queensland Government. Retrieved 7 June 2014.
- Premier Postal History. "Post Office List". Premier Postal Auctions. Retrieved 10 May 2014.
- "Opening and closing dates of Queensland Schools". Queensland Government. Retrieved 7 June 2014.
- Queensland Family History Society (2010), Queensland schools past and present (Version 1.01 ed.), Queensland Family History Society, ISBN 978-1-921171-26-0
- "Agency ID5357, Jimna State School". Queensland State Archives. Retrieved 8 June 2014.
- Environmental Protection Agency (Queensland) (2000). Heritage Trails of the Great South East. State of Queensland. pp. 162–163. ISBN 0-7345-1008-X.
- "Jimna Fire Tower (entry 601814)". Queensland Heritage Register. Queensland Heritage Council. Retrieved 12 July 2013.
- "Jimna Single Men's Barracks (former) (entry 602685)". Queensland Heritage Register. Queensland Heritage Council. Retrieved 12 July 2013.