diff --git a/apps/st/src/components/statistics/management/StatisticsPopulationManagement.tsx b/apps/st/src/components/statistics/management/StatisticsPopulationManagement.tsx
index d2005b437..dd59482c6 100644
--- a/apps/st/src/components/statistics/management/StatisticsPopulationManagement.tsx
+++ b/apps/st/src/components/statistics/management/StatisticsPopulationManagement.tsx
@@ -46,11 +46,10 @@ const StatisticsPopulationManagement = () => {
 
     const foreignTab = usePopulationMappingTab<ForeignPopulationItem>({
         kind: "foreign",
-      getList: async (statsYr, opt1) => {
-    const res = await statisticsPpltnApi.getForeignPopulationList(statsYr, opt1);
-    // res.data를 확실하게 ForeignPopulationItem[]로 캐스팅
-    return { ...res, data: res.data as ForeignPopulationItem[] };
-},
+        getList: async (statsYr, opt1) => {
+            const res = await statisticsPpltnApi.getForeignPopulationList(statsYr, opt1);
+            return { ...res, data: (res.data ?? []) as ForeignPopulationItem[] };
+        },
         uploadExcel: statisticsPpltnApi.uploadForeignPopulationExcel,
         saveFinal: statisticsPpltnApi.saveForeignPopulationFinal,
         getUpperCodesByName: statisticsPpltnApi.getUpperCodesByName,
diff --git a/apps/st/src/components/statistics/management/hooks/usePopulationMappingTab.ts b/apps/st/src/components/statistics/management/hooks/usePopulationMappingTab.ts
index fa5319994..7321753de 100644
--- a/apps/st/src/components/statistics/management/hooks/usePopulationMappingTab.ts
+++ b/apps/st/src/components/statistics/management/hooks/usePopulationMappingTab.ts
@@ -131,7 +131,7 @@ export function usePopulationMappingTab<TRow extends PopulationMappingRow>(
                     statsYr,
                     admdstCd: String(row.admdstCd ?? ""),
                     admdstNm: String(row.admdstNm ?? ""),
-                    sbstAdmdstCd: String(row.sbstAdmdstCd ?? ""),
+                    subAdmdstCd: String(row.sbstAdmdstCd ?? ""),
                 }));
 
             const res = await config.saveFinal(statsYr, regList);
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 70f82b121..ef819a160 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
@@ -1,4 +1,7 @@
-import type { UpperCodeCandidateItem } from "@/entities/statistics/model/ppltn/statistics-domestic-population-interface";
+import type {
+    DomesticPopulationMappingItem,
+    UpperCodeCandidateItem,
+} from "@/entities/statistics/model/ppltn/statistics-domestic-population-interface";
 import type { ApiResponse } from "@/entities/statistics/model/statistics-interface";
 
 /* ══════════════════════════════════════════════════
@@ -84,12 +87,7 @@ export type PopulationStatusListResponse = ApiResponse<PopulationStatusItem[]>;
 export type MappingTabKind = "domestic" | "foreign";
 
 /** 반영(최종 매핑 저장) 요청 시 서버로 보내는 단건 페이로드 - 내국인/외국인 공통 */
-export interface PopulationMappingRegItem {
-    statsYr: string;
-    admdstCd: string;
-    admdstNm: string;
-    sbstAdmdstCd: string;
-}
+export type PopulationMappingRegItem = DomesticPopulationMappingItem;
 
 /** 좌/우 그리드 행이 공통으로 가져야 하는 최소 필드 */
 export interface PopulationMappingRow {