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Since the closure of its mines and ironworks, Llanharry has been in economic decline, as are most South Wales Valleys villages once dependent on heavy industry. Llanharry's proximity to the M4 motorway in Wales has allowed its residents opportunities to commute to work more easily rather than seeking work locally.
Llanharry contains a few small local amenities, such as a corner shop and a hairdressers.
Llanharry is home to Llanharry Primary School, built 1935 and Ysgol Gyfun Llanhari Welsh medium secondary school which was built in 1974. In 2012 the secondary school became Rhondda Cynon Taf's first 3-19 school, opening a new Welsh language primary department in the former sixth form block.
Buses are the main transportation links servicing Llanharry. Between 1871 and 1951, the village was served by Llanharry railway station, but there is no longer any local rail connection. The nearest station is now Pontyclun. The M4 motorway skirts the southern end of the village, but there is no direct local access to it.
Llanharry is home to Llanharry AFC, a football team who compete in the Bridgend & District Premier Division. The team play in yellow shirts with black shorts & socks, and play their home games at The Recreation Ground in Llanharry.
Llanharry benefits from the Llanharry Action for Change Project which uses funds, including money from the European Union, to support projects and improvements in the village.
In terms of local politics Llanharry Community Council is responsible for representing the views of local people. To fund its activities, the Council receives a proportion of the council tax collected each year from every home in the village, depending on rateable value.
The Llanharry electoral ward is coterminous with the borders of the community and elects a county councillor to Rhondda Cynon Taf County Borough Council. Since 1995 the ward has been represented by either the Labour Party or Plaid Cymru, In the 2012 elections Labour Councillor Barry Stephens JP won the seat from Plaid Cymru and was elected Borough Councillor for Llanharry and Tylagarw. During his time in office he made many improvements to the previously neglected area including refurbishing and improving the main shopping area by adding paved areas with gardens and benches. He also put in a much needed path to The cemetery as previously residents had to walk in the road to get there. He was subsequently elected Mayor of Rhondda Cynon Taff 2015/2016. In the 2017 election Wayne Owen of the Boars Head Tylagarw won the seat as an Independent candidate. County Borough Council Elections 2017, Rhondda Cynon Taf County Borough Council. Retrieved 27 October 2018.
- "Community population 2015". Retrieved 16 November 2015.
- The Welsh Academy Encyclopaedia of Wales. John Davies, Nigel Jenkins, Menna Baines and Peredur Lynch (2008) pg500 ISBN 978-0-7083-1953-6
- Glamorgan Archives: Glamorgan Haematite Iron Ore Mine, Llanharry records Archived 2016-03-04 at the Wayback Machine. Accessed 5 June 2014
- http://www.rctcbc.gov.uk/services/en/legaldemocraticservices/councillorscommittees/meetings/cabinet/2011/09/26/reports/agendaitem4welshmediumeducationthefutureofygllanhari.pdf[permanent dead link]
- Chapman, C. (1984) The Cowbridge Railway. Oxford Publishing Company.
- "Election maps". Ordnance Survey. Retrieved 27 October 2018.
- Rhondda Cyon Taff County Borough Council Election Results 1995-2012, The Election Centre. Retrieved 27 October 2018.