{"license":"https://creativecommons.org/licenses/by/4.0/","dataset":"banking-markets","screenKey":"us-county-bank-branch-deposits","screenLabel":"County FDIC-insured branch deposits","year":2025,"metricLabel":"County deposit HHI","metricUnit":"HHI (0-10,000)","summary":{"branchCount":73568,"countyCount":3104,"highHhiCount":1792,"medianHhi":2826,"singleOrganizationCount":187,"stateCount":51,"totalDepositsThousands":18009447842},"source":{"accessDate":"2026-07-19","apiUrl":"https://api.fdic.gov/banks/sod?filters=YEAR%3A2025&fields=YEAR%2CCERT%2CNAMEFULL%2CSTALPBR%2CSTNAMEBR%2CSTCNTYBR%2CCNTYNAMB%2CDEPSUMBR%2CRSSDHCR%2CNAMEHCR","confidenceLevel":"high","dataStatus":"estimated_public","id":"fdic-sod-2025","methodologyNote":"Antitrust Radar sums positive June 30, 2025 branch deposits within each state, groups branches to the FDIC-reported top bank holding company when RSSDHCR is available and otherwise to the insured institution certificate, then calculates shares and HHI from those grouped balances.","publisher":"Federal Deposit Insurance Corporation","title":"2025 Summary of Deposits","url":"https://banks.data.fdic.gov/bankfind-suite/SOD","profileHref":"/sources/fdic-sod-2025"},"guardrail":"County rows are screens of positive FDIC Summary of Deposits branch balances grouped to the reported top bank holding company when available and otherwise to the insured institution. Branch-reported deposits may not represent where every customer lives or competes, county boundaries may not match a banking market, deposits are not every banking product, and these screens are not legal market definitions.","methodologyNote":"Antitrust Radar sums positive June 30, 2025 branch deposits within each FDIC-reported county or county equivalent, groups branches to the FDIC-reported top bank holding company when available and otherwise to the insured institution certificate, then calculates shares and HHI from those grouped balances.","methodologyHref":"/methodology#county-banking-screen","matchedCount":9,"count":9,"filters":{"states":["CT"],"statesMatched":true,"matchedStateCodes":["CT"],"county":null,"countyMatched":null,"fips":null,"fipsMatched":null,"fipses":[],"fipsesMatched":null,"matchedFipses":[],"unmatchedFipses":[],"selectionOrder":false,"history":null,"historyMatched":true,"from":null,"fromMatched":true,"to":null,"toMatched":true,"rangeMatched":true,"query":null,"concentrationClass":null,"concentrationClassMatched":true,"source":null,"sourceMatched":null,"year":null,"yearMatched":null,"sort":"hhi","sortMatched":true,"order":"desc","orderMatched":true,"limit":null,"limitMatched":true},"availableSorts":["hhi","leader_share","organizations","branches","deposits","county"],"availableConcentrationClasses":["unconcentrated","moderately_concentrated","highly_concentrated"],"rows":[{"branchCount":62,"concentrationClass":"highly_concentrated","countyFips":"09120","countyName":"Greater Bridgeport","depositRank":169,"hhi":3087,"hhiPercentile":55.9,"hhiRank":1369,"leadingOrganization":"M&T BANK CORPORATION","leadingOrganizationSharePct":52.3,"leaderShareRank":952,"organizationCount":16,"organizationDepthRank":316,"organizationsOver5pct":4,"profileHref":"/geographies/banking/09120","stateCode":"CT","stateCountyCount":9,"stateHref":"/geographies/connecticut","stateHhiRank":1,"stateMedianHhi":1922,"stateName":"Connecticut","totalDepositsThousands":13069478,"year":2025,"sourceId":"fdic-sod-2025","sourceTitle":"2025 Summary of Deposits","sourcePublisher":"Federal Deposit Insurance Corporation","sourceUrl":"https://banks.data.fdic.gov/bankfind-suite/SOD","sourceProfileHref":"/sources/fdic-sod-2025","accessDate":"2026-07-19","dataStatus":"estimated_public","confidenceLevel":"high","methodologyNote":"Antitrust Radar sums positive June 30, 2025 branch deposits within each FDIC-reported county or county equivalent, groups branches to the FDIC-reported top bank holding company when available and otherwise to the insured institution certificate, then calculates shares and HHI from those grouped balances.","methodologyHref":"/methodology#county-banking-screen","guardrail":"County rows are screens of positive FDIC Summary of Deposits branch balances grouped to the reported top bank holding company when available and otherwise to the insured institution. Branch-reported deposits may not represent where every customer lives or competes, county boundaries may not match a banking market, deposits are not every banking product, and these screens are not legal market definitions."},{"branchCount":235,"concentrationClass":"highly_concentrated","countyFips":"09110","countyName":"Capitol","depositRank":58,"hhi":2982,"hhiPercentile":53.6,"hhiRank":1442,"leadingOrganization":"BANK OF AMERICA CORPORATION","leadingOrganizationSharePct":51.5,"leaderShareRank":1002,"organizationCount":23,"organizationDepthRank":156,"organizationsOver5pct":4,"profileHref":"/geographies/banking/09110","stateCode":"CT","stateCountyCount":9,"stateHref":"/geographies/connecticut","stateHhiRank":2,"stateMedianHhi":1922,"stateName":"Connecticut","totalDepositsThousands":51931408,"year":2025,"sourceId":"fdic-sod-2025","sourceTitle":"2025 Summary of Deposits","sourcePublisher":"Federal Deposit Insurance Corporation","sourceUrl":"https://banks.data.fdic.gov/bankfind-suite/SOD","sourceProfileHref":"/sources/fdic-sod-2025","accessDate":"2026-07-19","dataStatus":"estimated_public","confidenceLevel":"high","methodologyNote":"Antitrust Radar sums positive June 30, 2025 branch deposits within each FDIC-reported county or county equivalent, groups branches to the FDIC-reported top bank holding company when available and otherwise to the insured institution certificate, then calculates shares and HHI from those grouped balances.","methodologyHref":"/methodology#county-banking-screen","guardrail":"County rows are screens of positive FDIC Summary of Deposits branch balances grouped to the reported top bank holding company when available and otherwise to the insured institution. Branch-reported deposits may not represent where every customer lives or competes, county boundaries may not match a banking market, deposits are not every banking product, and these screens are not legal market definitions."},{"branchCount":45,"concentrationClass":"highly_concentrated","countyFips":"09130","countyName":"Lower Connecticut River Valley","depositRank":303,"hhi":2649,"hhiPercentile":46,"hhiRank":1678,"leadingOrganization":"LIBERTY FINANCIAL CORPORATION","leadingOrganizationSharePct":47.1,"leaderShareRank":1214,"organizationCount":10,"organizationDepthRank":680,"organizationsOver5pct":6,"profileHref":"/geographies/banking/09130","stateCode":"CT","stateCountyCount":9,"stateHref":"/geographies/connecticut","stateHhiRank":3,"stateMedianHhi":1922,"stateName":"Connecticut","totalDepositsThousands":5822231,"year":2025,"sourceId":"fdic-sod-2025","sourceTitle":"2025 Summary of Deposits","sourcePublisher":"Federal Deposit Insurance Corporation","sourceUrl":"https://banks.data.fdic.gov/bankfind-suite/SOD","sourceProfileHref":"/sources/fdic-sod-2025","accessDate":"2026-07-19","dataStatus":"estimated_public","confidenceLevel":"high","methodologyNote":"Antitrust Radar sums positive June 30, 2025 branch deposits within each FDIC-reported county or county equivalent, groups branches to the FDIC-reported top bank holding company when available and otherwise to the insured institution certificate, then calculates shares and HHI from those grouped balances.","methodologyHref":"/methodology#county-banking-screen","guardrail":"County rows are screens of positive FDIC Summary of Deposits branch balances grouped to the reported top bank holding company when available and otherwise to the insured institution. Branch-reported deposits may not represent where every customer lives or competes, county boundaries may not match a banking market, deposits are not every banking product, and these screens are not legal market definitions."},{"branchCount":205,"concentrationClass":"moderately_concentrated","countyFips":"09190","countyName":"Western Connecticut","depositRank":49,"hhi":2427,"hhiPercentile":40.2,"hhiRank":1856,"leadingOrganization":"WEBSTER FINANCIAL CORPORATION","leadingOrganizationSharePct":46.5,"leaderShareRank":1242,"organizationCount":23,"organizationDepthRank":156,"organizationsOver5pct":5,"profileHref":"/geographies/banking/09190","stateCode":"CT","stateCountyCount":9,"stateHref":"/geographies/connecticut","stateHhiRank":4,"stateMedianHhi":1922,"stateName":"Connecticut","totalDepositsThousands":62581384,"year":2025,"sourceId":"fdic-sod-2025","sourceTitle":"2025 Summary of Deposits","sourcePublisher":"Federal Deposit Insurance Corporation","sourceUrl":"https://banks.data.fdic.gov/bankfind-suite/SOD","sourceProfileHref":"/sources/fdic-sod-2025","accessDate":"2026-07-19","dataStatus":"estimated_public","confidenceLevel":"high","methodologyNote":"Antitrust Radar sums positive June 30, 2025 branch deposits within each FDIC-reported county or county equivalent, groups branches to the FDIC-reported top bank holding company when available and otherwise to the insured institution certificate, then calculates shares and HHI from those grouped balances.","methodologyHref":"/methodology#county-banking-screen","guardrail":"County rows are screens of positive FDIC Summary of Deposits branch balances grouped to the reported top bank holding company when available and otherwise to the insured institution. Branch-reported deposits may not represent where every customer lives or competes, county boundaries may not match a banking market, deposits are not every banking product, and these screens are not legal market definitions."},{"branchCount":20,"concentrationClass":"moderately_concentrated","countyFips":"09150","countyName":"Northeastern Connecticut","depositRank":860,"hhi":1922,"hhiPercentile":25.8,"hhiRank":2303,"leadingOrganization":"HOMETOWN FINANCIAL GROUP MHC","leadingOrganizationSharePct":25.8,"leaderShareRank":2561,"organizationCount":7,"organizationDepthRank":1119,"organizationsOver5pct":5,"profileHref":"/geographies/banking/09150","stateCode":"CT","stateCountyCount":9,"stateHref":"/geographies/connecticut","stateHhiRank":5,"stateMedianHhi":1922,"stateName":"Connecticut","totalDepositsThousands":1462624,"year":2025,"sourceId":"fdic-sod-2025","sourceTitle":"2025 Summary of Deposits","sourcePublisher":"Federal Deposit Insurance Corporation","sourceUrl":"https://banks.data.fdic.gov/bankfind-suite/SOD","sourceProfileHref":"/sources/fdic-sod-2025","accessDate":"2026-07-19","dataStatus":"estimated_public","confidenceLevel":"high","methodologyNote":"Antitrust Radar sums positive June 30, 2025 branch deposits within each FDIC-reported county or county equivalent, groups branches to the FDIC-reported top bank holding company when available and otherwise to the insured institution certificate, then calculates shares and HHI from those grouped balances.","methodologyHref":"/methodology#county-banking-screen","guardrail":"County rows are screens of positive FDIC Summary of Deposits branch balances grouped to the reported top bank holding company when available and otherwise to the insured institution. Branch-reported deposits may not represent where every customer lives or competes, county boundaries may not match a banking market, deposits are not every banking product, and these screens are not legal market definitions."},{"branchCount":39,"concentrationClass":"unconcentrated","countyFips":"09160","countyName":"Northwest Hills","depositRank":449,"hhi":1392,"hhiPercentile":11,"hhiRank":2763,"leadingOrganization":"The Torrington Savings Bank","leadingOrganizationSharePct":22.2,"leaderShareRank":2798,"organizationCount":9,"organizationDepthRank":797,"organizationsOver5pct":8,"profileHref":"/geographies/banking/09160","stateCode":"CT","stateCountyCount":9,"stateHref":"/geographies/connecticut","stateHhiRank":6,"stateMedianHhi":1922,"stateName":"Connecticut","totalDepositsThousands":3484322,"year":2025,"sourceId":"fdic-sod-2025","sourceTitle":"2025 Summary of Deposits","sourcePublisher":"Federal Deposit Insurance Corporation","sourceUrl":"https://banks.data.fdic.gov/bankfind-suite/SOD","sourceProfileHref":"/sources/fdic-sod-2025","accessDate":"2026-07-19","dataStatus":"estimated_public","confidenceLevel":"high","methodologyNote":"Antitrust Radar sums positive June 30, 2025 branch deposits within each FDIC-reported county or county equivalent, groups branches to the FDIC-reported top bank holding company when available and otherwise to the insured institution certificate, then calculates shares and HHI from those grouped balances.","methodologyHref":"/methodology#county-banking-screen","guardrail":"County rows are screens of positive FDIC Summary of Deposits branch balances grouped to the reported top bank holding company when available and otherwise to the insured institution. Branch-reported deposits may not represent where every customer lives or competes, county boundaries may not match a banking market, deposits are not every banking product, and these screens are not legal market definitions."},{"branchCount":105,"concentrationClass":"unconcentrated","countyFips":"09140","countyName":"Naugatuck Valley","depositRank":172,"hhi":1255,"hhiPercentile":7.4,"hhiRank":2876,"leadingOrganization":"WEBSTER FINANCIAL CORPORATION","leadingOrganizationSharePct":24.3,"leaderShareRank":2657,"organizationCount":16,"organizationDepthRank":316,"organizationsOver5pct":7,"profileHref":"/geographies/banking/09140","stateCode":"CT","stateCountyCount":9,"stateHref":"/geographies/connecticut","stateHhiRank":7,"stateMedianHhi":1922,"stateName":"Connecticut","totalDepositsThousands":12584224,"year":2025,"sourceId":"fdic-sod-2025","sourceTitle":"2025 Summary of Deposits","sourcePublisher":"Federal Deposit Insurance Corporation","sourceUrl":"https://banks.data.fdic.gov/bankfind-suite/SOD","sourceProfileHref":"/sources/fdic-sod-2025","accessDate":"2026-07-19","dataStatus":"estimated_public","confidenceLevel":"high","methodologyNote":"Antitrust Radar sums positive June 30, 2025 branch deposits within each FDIC-reported county or county equivalent, groups branches to the FDIC-reported top bank holding company when available and otherwise to the insured institution certificate, then calculates shares and HHI from those grouped balances.","methodologyHref":"/methodology#county-banking-screen","guardrail":"County rows are screens of positive FDIC Summary of Deposits branch balances grouped to the reported top bank holding company when available and otherwise to the insured institution. Branch-reported deposits may not represent where every customer lives or competes, county boundaries may not match a banking market, deposits are not every banking product, and these screens are not legal market definitions."},{"branchCount":70,"concentrationClass":"unconcentrated","countyFips":"09180","countyName":"Southeastern Connecticut","depositRank":277,"hhi":1199,"hhiPercentile":5.9,"hhiRank":2921,"leadingOrganization":"Chelsea Groton Bank","leadingOrganizationSharePct":18.1,"leaderShareRank":2991,"organizationCount":14,"organizationDepthRank":398,"organizationsOver5pct":7,"profileHref":"/geographies/banking/09180","stateCode":"CT","stateCountyCount":9,"stateHref":"/geographies/connecticut","stateHhiRank":8,"stateMedianHhi":1922,"stateName":"Connecticut","totalDepositsThousands":6531731,"year":2025,"sourceId":"fdic-sod-2025","sourceTitle":"2025 Summary of Deposits","sourcePublisher":"Federal Deposit Insurance Corporation","sourceUrl":"https://banks.data.fdic.gov/bankfind-suite/SOD","sourceProfileHref":"/sources/fdic-sod-2025","accessDate":"2026-07-19","dataStatus":"estimated_public","confidenceLevel":"high","methodologyNote":"Antitrust Radar sums positive June 30, 2025 branch deposits within each FDIC-reported county or county equivalent, groups branches to the FDIC-reported top bank holding company when available and otherwise to the insured institution certificate, then calculates shares and HHI from those grouped balances.","methodologyHref":"/methodology#county-banking-screen","guardrail":"County rows are screens of positive FDIC Summary of Deposits branch balances grouped to the reported top bank holding company when available and otherwise to the insured institution. Branch-reported deposits may not represent where every customer lives or competes, county boundaries may not match a banking market, deposits are not every banking product, and these screens are not legal market definitions."},{"branchCount":131,"concentrationClass":"unconcentrated","countyFips":"09170","countyName":"South Central Connecticut","depositRank":113,"hhi":1086,"hhiPercentile":3.6,"hhiRank":2994,"leadingOrganization":"BANK OF AMERICA CORPORATION","leadingOrganizationSharePct":20.2,"leaderShareRank":2912,"organizationCount":16,"organizationDepthRank":316,"organizationsOver5pct":8,"profileHref":"/geographies/banking/09170","stateCode":"CT","stateCountyCount":9,"stateHref":"/geographies/connecticut","stateHhiRank":9,"stateMedianHhi":1922,"stateName":"Connecticut","totalDepositsThousands":20017983,"year":2025,"sourceId":"fdic-sod-2025","sourceTitle":"2025 Summary of Deposits","sourcePublisher":"Federal Deposit Insurance Corporation","sourceUrl":"https://banks.data.fdic.gov/bankfind-suite/SOD","sourceProfileHref":"/sources/fdic-sod-2025","accessDate":"2026-07-19","dataStatus":"estimated_public","confidenceLevel":"high","methodologyNote":"Antitrust Radar sums positive June 30, 2025 branch deposits within each FDIC-reported county or county equivalent, groups branches to the FDIC-reported top bank holding company when available and otherwise to the insured institution certificate, then calculates shares and HHI from those grouped balances.","methodologyHref":"/methodology#county-banking-screen","guardrail":"County rows are screens of positive FDIC Summary of Deposits branch balances grouped to the reported top bank holding company when available and otherwise to the insured institution. Branch-reported deposits may not represent where every customer lives or competes, county boundaries may not match a banking market, deposits are not every banking product, and these screens are not legal market definitions."}]}