Background: Research on transgender and gender-nonconforming (TGNC) aging is limited. To date, most of the literature about TGNC aging has focused on discrimination (particularly in healthcare), violence and abuse, caregiving and family relations, and religiosity.Aims: The purposes of this study were to: (a) document concerns about aging among TGNC adults, including concerns that are identity-specific; (b) examine preparation for aging and end of life (i.e., familiarity and planning) among TGNC adults; and (c) examine potential differences in familiarity and planning based on gender identity.Methods: One hundred fifty-four individuals who currently or have ever identified as TGNC completed a national online survey assessing these constructs.Results: TGNC individuals reported many concerns about aging, both gender identity-specific and not. The most common aging concern was losing the ability to care for themselves followed by having to go into a nursing home or assisted living facility. The age preparatory behaviors individuals were most commonly aware of included: life insurance, wills, organ donation, regular medical checkups, living wills, durable power of attorney for healthcare, and trusts. Gender-nonconforming individuals had significantly more familiarity with age preparatory behaviors than trans feminine individuals, but had lower levels of planning to engage in age preparatory behaviors than both trans masculine and trans feminine individuals.Conclusion: The current findings highlight the need for providers to address age preparatory behaviors with TGNC individuals or provide referrals to support individuals in this planning.