The Henry Lawson High School (abbreviated as THLHS) is a government-funded co-educational comprehensive secondary day school, located in Grenfell, a town in the Central West region of New South Wales, Australia.

Established in 1965, the school enrolled approximately 160 students in 2018, from Year 7 to Year 12, of whom five percent identified as Indigenous Australians and four percent were from a language background other than English.

[2] The school is operated by the NSW Department of Education; the principal is Aaron Flagg.

The school was named in honour of Henry Lawson, a famous Australian poet.

[3] The school was successful in the Young Achievement Australia awards in 1998 and 1999.