diff --git a/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IOrganizationUnitRepository.cs b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IOrganizationUnitRepository.cs
index e12d5a5f6d..561abd893f 100644
--- a/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IOrganizationUnitRepository.cs
+++ b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IOrganizationUnitRepository.cs
@@ -81,5 +81,10 @@ namespace Volo.Abp.Identity
             OrganizationUnit organizationUnit,
             CancellationToken cancellationToken = default
         );
+
+        Task<long> GetLongCountAsync(
+            Guid? parentId,
+            string filter = null,
+            CancellationToken cancellationToken = default);
     }
 }
diff --git a/modules/identity/src/Volo.Abp.Identity.EntityFrameworkCore/Volo/Abp/Identity/EntityFrameworkCore/EfCoreOrganizationUnitRepository.cs b/modules/identity/src/Volo.Abp.Identity.EntityFrameworkCore/Volo/Abp/Identity/EntityFrameworkCore/EfCoreOrganizationUnitRepository.cs
index 26dcc27426..311bb1a3dc 100644
--- a/modules/identity/src/Volo.Abp.Identity.EntityFrameworkCore/Volo/Abp/Identity/EntityFrameworkCore/EfCoreOrganizationUnitRepository.cs
+++ b/modules/identity/src/Volo.Abp.Identity.EntityFrameworkCore/Volo/Abp/Identity/EntityFrameworkCore/EfCoreOrganizationUnitRepository.cs
@@ -168,6 +168,16 @@ namespace Volo.Abp.Identity.EntityFrameworkCore
             DbContext.Set<IdentityUserOrganizationUnit>().RemoveRange(ouMembersQuery);
         }
 
+        public virtual async Task<long> GetLongCountAsync(Guid? parentId, string filter = null,
+            CancellationToken cancellationToken = default)
+        {
+            return await DbSet
+                .WhereIf(!filter.IsNullOrWhiteSpace(), ou =>
+                    ou.DisplayName.Contains(filter) ||
+                    ou.Code.Contains(filter))
+                .LongCountAsync(GetCancellationToken(cancellationToken));
+        }
+
         protected virtual IQueryable<IdentityUser> CreateGetMembersFilteredQuery(OrganizationUnit organizationUnit,
             string filter = null)
         {
diff --git a/modules/identity/src/Volo.Abp.Identity.MongoDB/Volo/Abp/Identity/MongoDB/MongoOrganizationUnitRepository.cs b/modules/identity/src/Volo.Abp.Identity.MongoDB/Volo/Abp/Identity/MongoDB/MongoOrganizationUnitRepository.cs
index 8c163d4126..a31acf13ad 100644
--- a/modules/identity/src/Volo.Abp.Identity.MongoDB/Volo/Abp/Identity/MongoDB/MongoOrganizationUnitRepository.cs
+++ b/modules/identity/src/Volo.Abp.Identity.MongoDB/Volo/Abp/Identity/MongoDB/MongoOrganizationUnitRepository.cs
@@ -16,7 +16,7 @@ namespace Volo.Abp.Identity.MongoDB
 {
     public class MongoOrganizationUnitRepository
         : MongoDbRepository<IAbpIdentityMongoDbContext, OrganizationUnit, Guid>,
-        IOrganizationUnitRepository
+            IOrganizationUnitRepository
     {
         public MongoOrganizationUnitRepository(
             IMongoDbContextProvider<IAbpIdentityMongoDbContext> dbContextProvider)
@@ -41,8 +41,8 @@ namespace Volo.Abp.Identity.MongoDB
             CancellationToken cancellationToken = default)
         {
             return await GetMongoQueryable()
-                    .Where(ou => ou.Code.StartsWith(code) && ou.Id != parentId.Value)
-                    .ToListAsync(GetCancellationToken(cancellationToken));
+                .Where(ou => ou.Code.StartsWith(code) && ou.Id != parentId.Value)
+                .ToListAsync(GetCancellationToken(cancellationToken));
         }
 
         public virtual async Task<List<OrganizationUnit>> GetListAsync(
@@ -51,22 +51,26 @@ namespace Volo.Abp.Identity.MongoDB
             CancellationToken cancellationToken = default)
         {
             return await GetMongoQueryable()
-                    .Where(t => ids.Contains(t.Id))
-                    .ToListAsync(GetCancellationToken(cancellationToken));
+                .Where(t => ids.Contains(t.Id))
+                .ToListAsync(GetCancellationToken(cancellationToken));
         }
 
         public virtual async Task<List<OrganizationUnit>> GetListAsync(
             string sorting = null,
             int maxResultCount = int.MaxValue,
             int skipCount = 0,
+            string filter = null,
             bool includeDetails = false,
             CancellationToken cancellationToken = default)
         {
             return await GetMongoQueryable()
-                    .OrderBy(sorting ?? nameof(OrganizationUnit.DisplayName))
-                    .As<IMongoQueryable<OrganizationUnit>>()
-                    .PageBy<OrganizationUnit, IMongoQueryable<OrganizationUnit>>(skipCount, maxResultCount)
-                    .ToListAsync(GetCancellationToken(cancellationToken));
+                .WhereIf(!filter.IsNullOrWhiteSpace(),
+                    ou => ou.DisplayName.Contains(filter) ||
+                          ou.Code.Contains(filter))
+                .OrderBy(sorting ?? nameof(OrganizationUnit.DisplayName))
+                .As<IMongoQueryable<OrganizationUnit>>()
+                .PageBy<OrganizationUnit, IMongoQueryable<OrganizationUnit>>(skipCount, maxResultCount)
+                .ToListAsync(GetCancellationToken(cancellationToken));
         }
 
         public virtual async Task<OrganizationUnit> GetAsync(
@@ -135,13 +139,15 @@ namespace Volo.Abp.Identity.MongoDB
             return await query.CountAsync(GetCancellationToken(cancellationToken));
         }
 
-        public virtual Task RemoveAllRolesAsync(OrganizationUnit organizationUnit, CancellationToken cancellationToken = default)
+        public virtual Task RemoveAllRolesAsync(OrganizationUnit organizationUnit,
+            CancellationToken cancellationToken = default)
         {
             organizationUnit.Roles.Clear();
             return Task.FromResult(0);
         }
 
-        public virtual async Task RemoveAllMembersAsync(OrganizationUnit organizationUnit, CancellationToken cancellationToken = default)
+        public virtual async Task RemoveAllMembersAsync(OrganizationUnit organizationUnit,
+            CancellationToken cancellationToken = default)
         {
             var users = await DbContext.Users.AsQueryable()
                 .Where(u => u.OrganizationUnits.Any(uou => uou.OrganizationUnitId == organizationUnit.Id))
@@ -155,7 +161,18 @@ namespace Volo.Abp.Identity.MongoDB
             }
         }
 
-        protected virtual IMongoQueryable<IdentityUser> CreateGetMembersFilteredQuery(OrganizationUnit organizationUnit, string filter = null)
+        public virtual async Task<long> GetLongCountAsync(Guid? parentId, string filter = null,
+            CancellationToken cancellationToken = default)
+        {
+            return await GetMongoQueryable()
+                .WhereIf<OrganizationUnit, IMongoQueryable<OrganizationUnit>>(!filter.IsNullOrWhiteSpace(), ou =>
+                    ou.DisplayName.Contains(filter) ||
+                    ou.Code.Contains(filter))
+                .LongCountAsync(GetCancellationToken(cancellationToken));
+        }
+
+        protected virtual IMongoQueryable<IdentityUser> CreateGetMembersFilteredQuery(OrganizationUnit organizationUnit,
+            string filter = null)
         {
             return DbContext.Users.AsQueryable()
                 .Where(u => u.OrganizationUnits.Any(uou => uou.OrganizationUnitId == organizationUnit.Id))
@@ -168,4 +185,4 @@ namespace Volo.Abp.Identity.MongoDB
                 );
         }
     }
-}
+}
\ No newline at end of file