diff --git a/backend/openapi.json b/backend/openapi.json
index 07a0373a3..2dacb13a7 100644
--- a/backend/openapi.json
+++ b/backend/openapi.json
@@ -616,6 +616,7 @@
         "description": "Polling station of a certain [Election]",
         "required": [
           "id",
+          "election_id",
           "name",
           "number",
           "polling_station_type",
@@ -625,6 +626,11 @@
           "locality"
         ],
         "properties": {
+          "election_id": {
+            "type": "integer",
+            "format": "int32",
+            "minimum": 0
+          },
           "house_number": {
             "type": "string"
           },
diff --git a/backend/src/polling_station/mod.rs b/backend/src/polling_station/mod.rs
index ea203ab65..3ffe4673a 100644
--- a/backend/src/polling_station/mod.rs
+++ b/backend/src/polling_station/mod.rs
@@ -54,6 +54,7 @@ impl IntoResponse for DataEntryResponse {
     )]
 pub async fn polling_station_data_entry(
     State(polling_station_data_entries): State<PollingStationDataEntries>,
+    State(polling_stations_repo): State<PollingStations>,
     State(elections): State<Elections>,
     Path((id, entry_number)): Path<(u32, u8)>,
     data_entry_request: DataEntryRequest,
@@ -65,10 +66,8 @@ pub async fn polling_station_data_entry(
         ));
     }
 
-    // future: need to resolve election id from polling station once we have
-    // polling stations in the database, #106
-    let election_id = 1;
-    let election = elections.get(election_id).await?;
+    let polling_station = polling_stations_repo.get(id).await?;
+    let election = elections.get(polling_station.election_id).await?;
 
     let mut validation_results = ValidationResults::default();
     data_entry_request
@@ -104,13 +103,12 @@ pub async fn polling_station_data_entry(
 pub async fn polling_station_data_entry_finalise(
     State(pool): State<SqlitePool>,
     State(polling_station_data_entries): State<PollingStationDataEntries>,
+    State(polling_stations_repo): State<PollingStations>,
     State(elections): State<Elections>,
     Path((id, entry_number)): Path<(u32, u8)>,
 ) -> Result<(), APIError> {
-    // future: need to resolve election id from polling station once we have
-    // polling stations in the database, #106
-    let election_id = 1;
-    let election = elections.get(election_id).await?;
+    let polling_station = polling_stations_repo.get(id).await?;
+    let election = elections.get(polling_station.election_id).await?;
 
     let mut tx = pool.begin().await?;
 
@@ -167,7 +165,7 @@ mod tests {
 
     use super::*;
 
-    #[sqlx::test(fixtures(path = "../../fixtures", scripts("elections")))]
+    #[sqlx::test(fixtures(path = "../../fixtures", scripts("elections", "polling_stations")))]
     async fn test_polling_station_data_entry_valid(pool: SqlitePool) {
         let mut request_body = DataEntryRequest {
             data: PollingStationResults {
@@ -212,6 +210,7 @@ mod tests {
         async fn save(pool: SqlitePool, request_body: DataEntryRequest) -> Response {
             polling_station_data_entry(
                 State(PollingStationDataEntries::new(pool.clone())),
+                State(PollingStations::new(pool.clone())),
                 State(Elections::new(pool.clone())),
                 Path((1, 1)),
                 request_body.clone(),
@@ -224,6 +223,7 @@ mod tests {
             polling_station_data_entry_finalise(
                 State(pool.clone()),
                 State(PollingStationDataEntries::new(pool.clone())),
+                State(PollingStations::new(pool.clone())),
                 State(Elections::new(pool.clone())),
                 Path((1, 1)),
             )
diff --git a/backend/src/polling_station/repository.rs b/backend/src/polling_station/repository.rs
index 0ef8e2fd9..70e348872 100644
--- a/backend/src/polling_station/repository.rs
+++ b/backend/src/polling_station/repository.rs
@@ -8,29 +8,60 @@ use super::PollingStation;
 pub struct PollingStations(SqlitePool);
 
 impl PollingStations {
+    #[cfg(test)]
+    pub fn new(pool: SqlitePool) -> Self {
+        Self(pool)
+    }
+
     pub async fn list(&self, election_id: u32) -> Result<Vec<PollingStation>, sqlx::Error> {
         query_as!(
             PollingStation,
             r#"
-SELECT
-  id,
-  name,
-  number,
-  number_of_voters,
-  polling_station_type,
-  street,
-  house_number,
-  house_number_addition,
-  postal_code,
-  locality
-FROM polling_stations
-WHERE election_id = $1;
-"#,
+            SELECT
+                id AS "id: u32",
+                election_id AS "election_id: u32",
+                name,
+                number,
+                number_of_voters,
+                polling_station_type,
+                street,
+                house_number,
+                house_number_addition,
+                postal_code,
+                locality
+            FROM polling_stations
+            WHERE election_id = $1
+        "#,
             election_id
         )
         .fetch_all(&self.0)
         .await
     }
+
+    pub async fn get(&self, id: u32) -> Result<PollingStation, sqlx::Error> {
+        query_as!(
+            PollingStation,
+            r#"
+            SELECT
+                id AS "id: u32",
+                election_id AS "election_id: u32",
+                name,
+                number,
+                number_of_voters,
+                polling_station_type,
+                street,
+                house_number,
+                house_number_addition,
+                postal_code,
+                locality
+            FROM polling_stations
+            WHERE id = $1
+        "#,
+            id
+        )
+        .fetch_one(&self.0)
+        .await
+    }
 }
 
 pub struct PollingStationDataEntries(SqlitePool);
diff --git a/backend/src/polling_station/structs.rs b/backend/src/polling_station/structs.rs
index da07951e9..9bd8d4cf2 100644
--- a/backend/src/polling_station/structs.rs
+++ b/backend/src/polling_station/structs.rs
@@ -20,6 +20,7 @@ pub trait Validate {
 #[derive(Serialize, Deserialize, ToSchema, Debug, FromRow)]
 pub struct PollingStation {
     pub id: i64,
+    pub election_id: u32,
     pub name: String,
     pub number: i64,
     pub number_of_voters: Option<i64>,
diff --git a/backend/tests/polling_station_integration_test.rs b/backend/tests/polling_station_integration_test.rs
index f3b6400d7..b16d34b17 100644
--- a/backend/tests/polling_station_integration_test.rs
+++ b/backend/tests/polling_station_integration_test.rs
@@ -34,7 +34,7 @@ async fn test_polling_station_listing_works(pool: SqlitePool) {
         .any(|ps| ps.name == "Stembureau \"Op Rolletjes\""));
 }
 
-#[sqlx::test(fixtures(path = "../fixtures", scripts("elections")))]
+#[sqlx::test(fixtures(path = "../fixtures", scripts("elections", "polling_stations")))]
 async fn test_polling_station_data_entry_valid(pool: SqlitePool) {
     let addr = serve_api(pool).await;
 
@@ -129,7 +129,7 @@ async fn test_polling_station_data_entry_invalid(pool: SqlitePool) {
     );
 }
 
-#[sqlx::test(fixtures(path = "../fixtures", scripts("elections")))]
+#[sqlx::test(fixtures(path = "../fixtures", scripts("elections", "polling_stations")))]
 async fn test_polling_station_data_entry_validation(pool: SqlitePool) {
     let addr = serve_api(pool).await;