Background: Timely delivery of palliative and end-of-life care (EOL) are essential components of high-quality cancer care. To date, however, few studies have examined process measures for EOL care in young adult (YA; ages 18-35 years) cancer decedents. Methods: We conducted a retrospective study using medical records of YA decedents who received cancer treatment at an academic cancer center between Jan. 1, 2012 and June 13, 2018. We used natural language processing (NLP) with validated key words to identify documentation of four process measures – palliative care involvement, and discussions of goals of care, code status, and hospice – from documented clinical encounters in the medical record within 6 months of death. Results: During this period 146/2,878 (5.1%) YA patients had a recorded death date and a first note at least 31 days prior to death. In this decedent cohort, the mean age was 28.2 years (SD=4.4) and 58.9% were men. The most common diagnoses were brain cancer (33.6%), sarcoma (19.9%), and breast cancer (12.3%). The 146 patients accrued 26,441 clinical notes during the last 6 months of life (median=116.5 notes, IQR 37.0-222.0). Using NLP, we identified that 68.5% of the 146 YAs had at least one process measure documented in the last 6 months of life, including: 54.1% palliative care involvement; 56.8% discussions of goals of care; 47.3% discussions of code status; and 51.4% discussions of hospice. On average, palliative care was documented 7.5 times (range 0-75); goals of care 6.1 times (range 0-43), code status 1.9 times (range 0-12), and hospice 8.1 times (range 0-67). Late documentation of process measures (defined as first recorded within 30 days of death) included: hospice (45.3%), code status (30.3%), palliative care (20.8%), and goals of care (9.6%). Notably, in 31.5% of YAs, we did not detect documentation of any process measures prior to death. Conclusions: In this cohort of YA cancer decedents, nearly one-third of YAs did not have documentation of any process measures, highlighting the importance of efforts to improve EOL care communication with this young population.