diff --git a/cmd/select/account/account.go b/cmd/select/account/account.go
index e4e2bb4..7df0b21 100644
--- a/cmd/select/account/account.go
+++ b/cmd/select/account/account.go
@@ -34,6 +34,9 @@ func AccountCmd() *cobra.Command {
 	cmd.Flags().StringVarP(&opts.Account, "account", "a", "", "Account to select")
 	cmd.Flags().StringVar(&opts.Host, "host", "", "Pangolin host where account is located")
 
+	_ = cmd.RegisterFlagCompletionFunc("account", completeAccountFlag)
+	_ = cmd.RegisterFlagCompletionFunc("host", completeHostFlag)
+
 	return cmd
 }
 
diff --git a/cmd/select/account/completion.go b/cmd/select/account/completion.go
new file mode 100644
index 0000000..d120609
--- /dev/null
+++ b/cmd/select/account/completion.go
@@ -0,0 +1,38 @@
+package account
+
+import (
+	"maps"
+	"slices"
+	"strings"
+
+	"github.com/fosrl/cli/internal/config"
+	"github.com/spf13/cobra"
+)
+
+func completeAccountFlag(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+	accountStore := config.AccountStoreFromContext(cmd.Context())
+
+	candidateSet := make(map[string]struct{})
+
+	for _, v := range accountStore.Accounts {
+		if strings.HasPrefix(v.Email, toComplete) {
+			candidateSet[v.Email] = struct{}{}
+		}
+	}
+
+	return slices.Collect(maps.Keys(candidateSet)), cobra.ShellCompDirectiveNoFileComp
+}
+
+func completeHostFlag(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+	accountStore := config.AccountStoreFromContext(cmd.Context())
+
+	candidateSet := make(map[string]struct{})
+
+	for _, v := range accountStore.Accounts {
+		if strings.HasPrefix(v.Host, toComplete) {
+			candidateSet[v.Host] = struct{}{}
+		}
+	}
+
+	return slices.Collect(maps.Keys(candidateSet)), cobra.ShellCompDirectiveNoFileComp
+}
diff --git a/cmd/select/org/completion.go b/cmd/select/org/completion.go
new file mode 100644
index 0000000..c303487
--- /dev/null
+++ b/cmd/select/org/completion.go
@@ -0,0 +1,34 @@
+package org
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/fosrl/cli/internal/api"
+	"github.com/fosrl/cli/internal/config"
+	"github.com/spf13/cobra"
+)
+
+func completeOrgID(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+	apiClient := api.FromContext(cmd.Context())
+	accountStore := config.AccountStoreFromContext(cmd.Context())
+
+	activeAccount, err := accountStore.ActiveAccount()
+	if err != nil {
+		return []string{}, cobra.ShellCompDirectiveNoFileComp
+	}
+
+	orgsResponse, err := apiClient.ListUserOrgs(activeAccount.UserID)
+	if err != nil {
+		return []string{}, cobra.ShellCompDirectiveNoFileComp
+	}
+
+	var candidates []string
+	for _, org := range orgsResponse.Orgs {
+		if strings.HasPrefix(org.OrgID, toComplete) {
+			candidates = append(candidates, fmt.Sprintf("%s\t%s", org.OrgID, org.Name))
+		}
+	}
+
+	return candidates, cobra.ShellCompDirectiveNoFileComp
+}
diff --git a/cmd/select/org/org.go b/cmd/select/org/org.go
index f3943b4..fd45ca8 100644
--- a/cmd/select/org/org.go
+++ b/cmd/select/org/org.go
@@ -33,6 +33,8 @@ func OrgCmd() *cobra.Command {
 
 	cmd.Flags().StringVar(&opts.OrgID, "org", "", "Organization `ID` to select")
 
+	_ = cmd.RegisterFlagCompletionFunc("org", completeOrgID)
+
 	return cmd
 }