diff --git a/apps/st/src/components/statistics/management/DomesticPopulationTab.tsx b/apps/st/src/components/statistics/management/DomesticPopulationTab.tsx
index 7a1e243ce..e5d911b09 100644
--- a/apps/st/src/components/statistics/management/DomesticPopulationTab.tsx
+++ b/apps/st/src/components/statistics/management/DomesticPopulationTab.tsx
@@ -98,7 +98,7 @@ const DomesticPopulationTab = ({ tab, statsYr, onFileButtonClick }: Props) => {
             enableSort={false}
              getGridRef={rightGridRef}  // ← 추가
             onDataCellClick={({ row, fieldName }) => {
-                if (fieldName === "mpinCd") return;
+                if (fieldName === "sbstAdmdstCd") return;
                 if (fieldName === "admdstCd") {
                     const gridView = rightGridRef.current?.gridView as
                         | GridViewWithEditCommit
@@ -108,7 +108,7 @@ const DomesticPopulationTab = ({ tab, statsYr, onFileButtonClick }: Props) => {
                         tab.setRightRowData((prev) =>
                             prev.map((r) =>
                                 r.admdstCd === row.admdstCd
-                                    ? { ...r, mpinCd: String(row.admdstCd ?? "") }
+                                    ? { ...r, sbstAdmdstCd: String(row.admdstCd ?? "") }
                                     : r,
                             ),
                         );
@@ -117,7 +117,7 @@ const DomesticPopulationTab = ({ tab, statsYr, onFileButtonClick }: Props) => {
                 }
             }}
             onCellDblClick={({ row, fieldName }) => {
-                if (fieldName !== "mpinCd") return;
+                if (fieldName !== "sbstAdmdstCd") return;
                 void tab.handleRightRowClick(fromGridRow<DomesticPopulationItem>(row), statsYr);
             }}
         />
diff --git a/apps/st/src/components/statistics/management/ForeignPopulationTab.tsx b/apps/st/src/components/statistics/management/ForeignPopulationTab.tsx
index af9b53b16..49fc398fc 100644
--- a/apps/st/src/components/statistics/management/ForeignPopulationTab.tsx
+++ b/apps/st/src/components/statistics/management/ForeignPopulationTab.tsx
@@ -97,7 +97,7 @@ const ForeignPopulationTab = ({ tab, statsYr, onFileButtonClick }: Props) => {
                 enableSort={false}
               getGridRef={rightGridRef}  
             onDataCellClick={({ row, fieldName }) => {
-                if (fieldName === "mpinCd") return;
+                if (fieldName === "sbstAdmdstCd") return;
                 if (fieldName === "admdstCd") {
                     const gridView = rightGridRef.current?.gridView as
                         | GridViewWithEditCommit
@@ -107,7 +107,7 @@ const ForeignPopulationTab = ({ tab, statsYr, onFileButtonClick }: Props) => {
                         tab.setRightRowData((prev) =>
                             prev.map((r) =>
                                 r.admdstCd === row.admdstCd
-                                    ? { ...r, mpinCd: String(row.admdstCd ?? "") }
+                                    ? { ...r, sbstAdmdstCd: String(row.admdstCd ?? "") }
                                     : r,
                             ),
                         );
@@ -116,7 +116,7 @@ const ForeignPopulationTab = ({ tab, statsYr, onFileButtonClick }: Props) => {
                 }
             }}
             onCellDblClick={({ row, fieldName }) => {
-                if (fieldName !== "mpinCd") return;
+                if (fieldName !== "sbstAdmdstCd") return;
                 void tab.handleRightRowClick(fromGridRow<ForeignPopulationItem>(row), statsYr);
             }}
         />
diff --git a/apps/st/src/components/statistics/management/hooks/usePopulationMappingTab.ts b/apps/st/src/components/statistics/management/hooks/usePopulationMappingTab.ts
index 7f36f785d..fa5319994 100644
--- a/apps/st/src/components/statistics/management/hooks/usePopulationMappingTab.ts
+++ b/apps/st/src/components/statistics/management/hooks/usePopulationMappingTab.ts
@@ -126,12 +126,12 @@ export function usePopulationMappingTab<TRow extends PopulationMappingRow>(
 
         await run(async () => {
             const regList = rightRowData
-                .filter((row) => String(row.mpinCd ?? "").trim() !== "")
+                .filter((row) => String(row.sbstAdmdstCd ?? "").trim() !== "")
                 .map((row) => ({
                     statsYr,
                     admdstCd: String(row.admdstCd ?? ""),
                     admdstNm: String(row.admdstNm ?? ""),
-                    subAdmdstCd: String(row.mpinCd ?? ""),
+                    sbstAdmdstCd: String(row.sbstAdmdstCd ?? ""),
                 }));
 
             const res = await config.saveFinal(statsYr, regList);
@@ -167,7 +167,7 @@ const handleRightRowClick = async (rowData: TRow, statsYr: string) => {
         const rowIndex = selectedRowIndexRef.current;
         if (rowIndex === null) return;
         setRightRowData((prev) =>
-            prev.map((row, idx) => (idx === rowIndex ? { ...row, mpinCd: item["admdstCd"] ?? "" } : row)),
+            prev.map((row, idx) => (idx === rowIndex ? { ...row, sbstAdmdstCd: item["admdstCd"] ?? "" } : row)),
         );
         selectedRowIndexRef.current = null;
     };
diff --git a/apps/st/src/components/statistics/management/types/population-tab-types.ts b/apps/st/src/components/statistics/management/types/population-tab-types.ts
index 1560e2a3b..70f82b121 100644
--- a/apps/st/src/components/statistics/management/types/population-tab-types.ts
+++ b/apps/st/src/components/statistics/management/types/population-tab-types.ts
@@ -14,7 +14,7 @@ export interface ForeignPopulationItem {
     frgnrMlPpltnCnt: number;
     frgnrFmlPpltnCnt: number;
     /** 미매핑 리스트(우측) 전용 - 매핑 대상 행정구역코드(상위코드) */
-    mpinCd: string;
+    sbstAdmdstCd: string;
 }
 
 export type ForeignPopulationListResponse = ApiResponse<ForeignPopulationItem[]>;
@@ -88,7 +88,7 @@ export interface PopulationMappingRegItem {
     statsYr: string;
     admdstCd: string;
     admdstNm: string;
-    subAdmdstCd: string;
+    sbstAdmdstCd: string;
 }
 
 /** 좌/우 그리드 행이 공통으로 가져야 하는 최소 필드 */
@@ -96,7 +96,7 @@ export interface PopulationMappingRow {
     admdstCd: string;
     admdstNm: string;
     /** 우측(미매핑 리스트) 전용 필드. 좌측 데이터에는 존재하지 않을 수 있음 */
-    mpinCd?: string;
+    sbstAdmdstCd?: string;
 }
 
 /** usePopulationMappingTab에 주입하는 API/검증 설정 - 내국인/외국인 탭이 이 설정만 다르게 넘김 */
diff --git a/apps/st/src/components/util/column/management/DomesticPopulationColumn.ts b/apps/st/src/components/util/column/management/DomesticPopulationColumn.ts
index 7cc5d6295..2b30b18c8 100644
--- a/apps/st/src/components/util/column/management/DomesticPopulationColumn.ts
+++ b/apps/st/src/components/util/column/management/DomesticPopulationColumn.ts
@@ -94,8 +94,8 @@ export const DomesticPopulationRightColumnConfig: ColumnInfoList = {
             styleName: "rg-cell-readonly",
         },
         {
-            name: "mpinCd",
-            fieldName: "mpinCd",
+            name: "sbstAdmdstCd",
+            fieldName: "sbstAdmdstCd",
             header: { text: "맵핑코드" },
             width: 130,
             editable: true
@@ -134,7 +134,7 @@ export const DomesticPopulationRightColumnConfig: ColumnInfoList = {
     columnLayout: [
         "admdstCd",
         "admdstNm",
-        "mpinCd",
+        "sbstAdmdstCd",
         {
             name: "populationGroup",
             header: { text: "인구수" },
diff --git a/apps/st/src/components/util/column/management/ForeignPopulationColumn.ts b/apps/st/src/components/util/column/management/ForeignPopulationColumn.ts
index e52e46552..46ae5518f 100644
--- a/apps/st/src/components/util/column/management/ForeignPopulationColumn.ts
+++ b/apps/st/src/components/util/column/management/ForeignPopulationColumn.ts
@@ -111,8 +111,8 @@ export const ForeignPopulationRightColumnConfig: ColumnInfoList = {
             styleName: "rg-cell-readonly",
         },
         {
-            name: "mpinCd",
-            fieldName: "mpinCd",
+            name: "sbstAdmdstCd",
+            fieldName: "sbstAdmdstCd",
             header: { text: "맵핑코드" },
             width: 130,
             editable: true
@@ -153,7 +153,7 @@ export const ForeignPopulationRightColumnConfig: ColumnInfoList = {
          "sido", 
          "gugun",
         "admdstNm",
-        "mpinCd",
+        "sbstAdmdstCd",
         {
             name: "populationGroup",
             header: { text: "외국인수" },
diff --git a/apps/st/src/entities/statistics/model/ppltn/statistics-domestic-population-interface.ts b/apps/st/src/entities/statistics/model/ppltn/statistics-domestic-population-interface.ts
index 0adabf98b..347686a3a 100644
--- a/apps/st/src/entities/statistics/model/ppltn/statistics-domestic-population-interface.ts
+++ b/apps/st/src/entities/statistics/model/ppltn/statistics-domestic-population-interface.ts
@@ -13,7 +13,7 @@ export interface DomesticPopulationItem {
     domplMlPpltnCnt: number;       // 내국인 남성 인구수
     domplFmlPpltnCnt: number;      // 내국인 여성 인구수
     /** 미매핑 리스트 전용 - 매핑 대상 행정구역코드 (상위코드) */
-    mpinCd: string;
+    sbstAdmdstCd: string;
 }
 
 /** 엑셀 업로드 요청 파라미터 */