Marsinah (10 April 1969 – c. 8 May 1993) was an independent trade unionist employed in a watch factory in East Java, Indonesia, whose murder drew international attention to the Suharto dictatorship's brutal repression of workers.

Unable to find employment in Nglundo, Marsinah turned her attention to the big cities, sending in job applications to Surabaya, Mojokerto and Gresik.

Making a lateral transfer to their Porong factory after its opening, Marsinah eventually found herself serving as a spokesperson for her fellow workers.

When, in 1993, the Governor of East Java announced a raise in the provincial minimum wage, Catur Putra Surya (a company with ties to the Indonesian military–industrial complex) refused to comply.

On 5 May, the Sidoarjo District Military Command summoned 13 workers to its headquarters and forced them to sign letters of resignation, with eight more to follow in the next couple of days.

[5] Marsinah's murder was also used by human rights groups to pressure the United States to prevent the renewal of Indonesia's most favoured nation status.