Credit Union Routing Number
Tidemark Federal Credit Union Routing Number
The routing number for Tidemark Federal Credit Union is 231176884. It is a credit union in Seaford, Delaware, NCUA charter 13121.
Data as of · size and membership from the NCUA 5300 call report. How we update
About Tidemark Federal Credit Union
Tidemark Federal Credit Union is based in Seaford, Delaware, and has been chartered since 1959. It reported $468.5M in assets for Q2 2026, the 3rd largest of 15 credit unions headquartered in Delaware and 784th of 4,252 nationally. Assets were $461.4M a year earlier (Q2 2025), so the credit union is larger now. It counted 22,300 members on that report. The NCUA lists 7 branch locations for the credit union.
Record
- Routing number
- 231176884
- NCUA charter number
- 13121
- RSSD ID
- 879989
- Headquarters
- Seaford, Delaware 19973
- Chartered
- 1959
- NCUA insured since
- January 4, 1971
- Total assets (Q2 2026)
- $468.5M
- Members (Q2 2026)
- 22,300
- Branch locations
- 7
- Routing record refreshed
- October 8, 2026
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View Tidemark Federal Credit Union's full profile →
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Regulator records: NCUA credit union profile (charter 13121) · FFIEC NIC profile (RSSD 879989)