Tumor recurrence, following initial response to adjuvant chemotherapy, is a major problem in women with high grade serous ovarian cancer (HGSOC). Microarray analysis of primary tumors has identified genes that may be useful in risk stratification/overall survival, but are of limited value in predicting the >70% rate for tumor recurrence. In this study we performed RNA-Seq analysis of primary and recurrent HGSOC to first identify unique differentially expressed genes. From this dataset we selected 21 archetypical coding genes and one non-coding-RNA, based on statistically significant differences in their expression profile between tumors, for validation by qPCR in a larger cohort of 110 ovarian tumors (71 primary, 39 recurrent) and for testing association of specific genes with time-to-recurrence (TTR). Kaplan-Meier tests revealed that high expression of collagen type II, alpha 1 (COL2A1) was associated with delayed TTR (HR=0.47, 95% CI: 0.27-0.82, p=.008), whereas low expression of the pseudogene, solute carrier family 6 member 10 (SLC6A10P), was associated with longer TTR (HR=.53, 95% CI: .30-.93, p=.027). Notably, TTR was significantly delayed for tumors that simultaneously expressed high COL2A1 and low SLC6A10P (HR=.21, 95% CI: 0.082-0.54, p=.0011); an estimated median of 95 months as compared to an estimated median of 16 months for subjects expressing other levels of COL2A1 and SLC6A10P. Thus evaluating expression levels of COL2A1 and SL6A10P at primary surgery could be beneficial for clinically managing recurrence of HGSOC. This article is protected by copyright. All rights reserved.