Tasmania decriminalizes homosexual activity, making homosexual activity legal in all Australian states.

Same-sex marriage has been legal in Australia since 9 December 2017. The legislation to allow same-sex marriage, the Marriage Amendment (Definition and Religious Freedoms) Act 2017, passed the Australian Parliament on 7 December 2017 and received royal assent from the Governor-General the following day.

In Tasmania, there are no laws restricting the discussion or promotion of LGBTQ+ topics.

In May 2019, Tasmania became the first state to allow its citizens (especially transgender/agender people) to obtain a birth certificate that accurately reflects their gender identity. Given the novelty of the law, the state’s peak law reform body was directed to consider the impact of the reforms on Tasmania’s system of law and justice. Today, the Tasmania Law Reform Institute reported its findings that the changes in the law have no significant unintended consequences for the law and justice system.

Australian youth outside of Queensland can begin accessing puberty blockers at the age of 10, full HRT is not typically prescribed until 16 and GCS is often not done until 18. However, nobody can access irreversible treatment until 15.

For Oestrogen or Testosterone two independent child and adolescent psychiatrists must do a standardised assessment of psychological development as well as a formal assessment of the child’s gender identification and capacity to understand the proposed treatment. A paediatric endocrinologist establishes the child’s pubertal stage, excludes disorders and discusses with the child and parents the effects and risks of puberty suppression.

For Puberty blockers a young person requires a multidisciplinary team consisting of a paediatrician, two mental health professionals (one must be a psychiatrist), and a fertility expert, to agree treatment is in the child’s best interests. It is then necessary to make an application to the Family Court for authorisation of treatment.

Non-binary gender is legally recognized in Tasmania.

In 1999, Tasmania's Anti-Discrimination Act of 1998 came into effect, including sexuality as a protected characteristic from employment discrimination. "Transsexuality" was included in this, but a 2013 amendment would later add "gender identity" as a characteristic representative of trans people.

No territory or state besides the Australian Capital Territory has banned intersex infant surgery.

LGBTQ+ people are allowed to serve in the Australian army.

(Australia is responsible for the defence of: Heard Island and McDonald Islands.)

In Australia sexually active LGBT people are unable to donate blood unless they abstain from sex for three months. Since 2021, the deferral period within Australia was reduced from 1 year to 3 months without PrEP.

In June 2023, the Therapeutic Goods Administration (TGA) approved a submission from Australian Red Cross Lifeblood calling to remove most sexual activity ineligibility criteria for plasma donors.

There are no laws in place banning conversion therapy. However, the Tasmania Law Reform Institute (TLR) is pushing for a conversion therapy ban, among other amendments to the law regarding LGBT.