Northern Mariana Islands
Branch-office deposits reported to the FDIC Summary of Deposits survey by institutions operating in Northern Mariana Islands, June 30 of each survey year, 1994–2025. Dollar figures are the survey’s thousands-of-USD unit displayed as $B/$T. Northern Mariana Islands is not one of the 50 states; small jurisdictions with few reporting institutions carry structurally high HHIs.
Deposits, 1994–2025
Office-assigned deposits at branches in Northern Mariana Islands went from $364.4M in 1994 to $944.6M in 2025, nominal.
Source: FDIC Summary of Deposits FDIC Summary of Deposits, June 30 of each survey year, 1994-2025. State-level aggregate of branch rows. Methodology
Branches and institutions
The branch network in Northern Mariana Islands peaked at 12 offices in 2001; the 2025 survey counts 6. The institution count moved from 5 (1994) to 4 (2025).
Source: FDIC Summary of Deposits FDIC Summary of Deposits, June 30 of each survey year, 1994-2025. Methodology
Deposit concentration (HHI)
Statewide institution-share HHI: the sum of squared percent shares of each institution’s in-state deposits, 0–10,000. The shaded bands are the agencies’ 2010 Horizontal Merger Guidelines classification (section 5.3): unconcentrated below 1,500, moderately concentrated 1,500–2,500, highly concentrated above 2,500. The dashed line marks the 2023 Merger Guidelines threshold, under which markets with an HHI above 1,800 are highly concentrated (Guideline 1). Northern Mariana Islands’s HHI is 3591 in 2025 (highly concentrated on the 2010 bands), against 3166 in 1994 and a span peak of 4876 in 2016. A statewide HHI is descriptive: merger review defines banking markets locally, not by state.
Source: FDIC Summary of Deposits | DOJ & FTC, Horizontal Merger Guidelines (2010), section 5.3 | DOJ & FTC, Merger Guidelines (2023), Guideline 1 HHI computed from FDIC Summary of Deposits branch rows, June 30 of each survey year, 1994-2025. Methodology
Largest institutions by in-state deposits, 2025
Branch rows grouped by FDIC certificate; names as reported to the survey. Share is of all SOD deposits booked in Northern Mariana Islands that year, the same shares the statewide HHI squares and sums.
| # | Institution | Deposits | Share | Branches |
|---|---|---|---|---|
| 1 | Bank of Guam cert 20884 | $407.5M | 43.14% | 3 |
| 2 | First Hawaiian Bank cert 17985 | $351.3M | 37.19% | 1 |
| 3 | Bank of Hawaii cert 18053 | $175.7M | 18.60% | 1 |
| 4 | BankPacific, Ltd cert 30692 | $10.1M | 1.07% | 1 |
Source: FDIC Summary of Deposits FDIC Summary of Deposits, June 30, 2025. Deposits are office-assigned; an institution's internal allocation practices shape where its balances appear. Methodology
County concentration extremes, 2025
Northern Mariana Islands has 3 county-level geographies in the survey, shown by county-level deposit HHI. A county served by a single institution sits at the 10,000 ceiling by construction; thin county markets are the norm outside metros.
All counties
| County | HHI | Inst. | Branches |
|---|---|---|---|
| Rota | 10000 | 1 | 1 |
| Tinian | 10000 | 1 | 1 |
| Saipan | 3557 | 4 | 4 |
Source: FDIC Summary of Deposits FDIC Summary of Deposits, June 30, 2025. County HHIs use institution shares of summed branch deposits within the county. Methodology
Back to the national overview, or see the methodology for the survey definition, the HHI construction, and the office-assignment caveat.