diff --git a/keyboards/silakka54/config.h b/keyboards/silakka54/config.h
new file mode 100644
index 0000000000..16f98fc7b4
--- /dev/null
+++ b/keyboards/silakka54/config.h
@@ -0,0 +1,25 @@
+/* Copyright 2024 Juho T. (@Squalius-cephalus)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#define SERIAL_USART_FULL_DUPLEX
+#define SERIAL_USART_TX_PIN GP0
+#define SERIAL_USART_RX_PIN GP1
+
+#define RP2040_BOOTLOADER_DOUBLE_TAP_RESET
+#define RP2040_BOOTLOADER_DOUBLE_TAP_RESET_TIMEOUT 200U
+#define RP2040_BOOTLOADER_DOUBLE_TAP_RESET_LED GP17
diff --git a/keyboards/silakka54/keyboard.json b/keyboards/silakka54/keyboard.json
new file mode 100644
index 0000000000..2d4871bce5
--- /dev/null
+++ b/keyboards/silakka54/keyboard.json
@@ -0,0 +1,104 @@
+{
+    "manufacturer": "Squalius-cephalus",
+    "keyboard_name": "silakka54",
+    "maintainer": "Squalius-cephalus",
+    "bootloader": "rp2040",
+    "diode_direction": "COL2ROW",
+    "features": {
+        "bootmagic": true,
+        "command": false,
+        "console": false,
+        "extrakey": true,
+        "mousekey": true,
+        "nkro": true
+    },
+    "split": {
+        "enabled": true,
+        "serial": {
+            "driver": "vendor"
+        }
+    },
+    "matrix_pins": {
+        "cols": ["GP7", "GP8", "GP9", "GP10", "GP11", "GP12"],
+        "rows": ["GP2", "GP3", "GP4", "GP5","GP6"]
+    },
+    "processor": "RP2040",
+    "url": "https://github.com/Squalius-cephalus/silakka54",
+    "usb": {
+        "device_version": "1.0.0",
+        "pid": "0x1212",
+        "vid": "0xFEED"
+    },
+    "layouts": {
+        "LAYOUT": {
+            "layout": [
+                {"matrix": [0, 0], "x": 0, "y": 0},
+                {"matrix": [0, 1], "x": 1, "y": 0},
+                {"matrix": [0, 2], "x": 2, "y": 0},
+                {"matrix": [0, 3], "x": 3, "y": 0},
+                {"matrix": [0, 4], "x": 4, "y": 0},
+                {"matrix": [0, 5], "x": 5, "y": 0},
+
+                {"matrix": [5, 5], "x": 0, "y": 5},
+                {"matrix": [5, 4], "x": 1, "y": 5},
+                {"matrix": [5, 3], "x": 2, "y": 5},
+                {"matrix": [5, 2], "x": 3, "y": 5},
+                {"matrix": [5, 1], "x": 4, "y": 5},
+                {"matrix": [5, 0], "x": 5, "y": 5},
+
+
+                {"matrix": [1, 0], "x": 0, "y": 1},
+                {"matrix": [1, 1], "x": 1, "y": 1},
+                {"matrix": [1, 2], "x": 2, "y": 1},
+                {"matrix": [1, 3], "x": 3, "y": 1},
+                {"matrix": [1, 4], "x": 4, "y": 1},
+                {"matrix": [1, 5], "x": 5, "y": 1},
+
+                {"matrix": [6, 5], "x": 0, "y": 6},
+                {"matrix": [6, 4], "x": 1, "y": 6},
+                {"matrix": [6, 3], "x": 2, "y": 6},
+                {"matrix": [6, 2], "x": 3, "y": 6},
+                {"matrix": [6, 1], "x": 4, "y": 6},
+                {"matrix": [6, 0], "x": 5, "y": 6},
+
+                {"matrix": [2, 0], "x": 0, "y": 2},
+                {"matrix": [2, 1], "x": 1, "y": 2},
+                {"matrix": [2, 2], "x": 2, "y": 2},
+                {"matrix": [2, 3], "x": 3, "y": 2},
+                {"matrix": [2, 4], "x": 4, "y": 2},
+                {"matrix": [2, 5], "x": 5, "y": 2},
+
+                {"matrix": [7, 5], "x": 0, "y": 7},
+                {"matrix": [7, 4], "x": 1, "y": 7},
+                {"matrix": [7, 3], "x": 2, "y": 7},
+                {"matrix": [7, 2], "x": 3, "y": 7},
+                {"matrix": [7, 1], "x": 4, "y": 7},
+                {"matrix": [7, 0], "x": 5, "y": 7},
+
+                {"matrix": [3, 0], "x": 0, "y": 3},
+                {"matrix": [3, 1], "x": 1, "y": 3},
+                {"matrix": [3, 2], "x": 2, "y": 3},
+                {"matrix": [3, 3], "x": 3, "y": 3},
+                {"matrix": [3, 4], "x": 4, "y": 3},
+                {"matrix": [3, 5], "x": 5, "y": 3},
+
+                {"matrix": [8, 5], "x": 0, "y": 9},
+                {"matrix": [8, 4], "x": 1, "y": 9},
+                {"matrix": [8, 3], "x": 2, "y": 9},
+                {"matrix": [8, 2], "x": 3, "y": 9},
+                {"matrix": [8, 1], "x": 4, "y": 9},
+                {"matrix": [8, 0], "x": 5, "y": 9},
+
+                {"matrix": [4, 3], "x": 3, "y": 4},
+                {"matrix": [4, 4], "x": 4, "y": 4},
+                {"matrix": [4, 5], "x": 5, "y": 4},
+
+                {"matrix": [9, 5], "x": 3, "y": 9},
+                {"matrix": [9, 4], "x": 4, "y": 9},
+                {"matrix": [9, 3], "x": 5, "y": 9}
+
+
+            ]
+        }
+    }
+}
diff --git a/keyboards/silakka54/keymaps/default/keymap.c b/keyboards/silakka54/keymaps/default/keymap.c
new file mode 100644
index 0000000000..aa5e64efa3
--- /dev/null
+++ b/keyboards/silakka54/keymaps/default/keymap.c
@@ -0,0 +1,22 @@
+// Copyright 2023 QMK
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+    [0] = LAYOUT(
+        KC_ESC,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,                               KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_MINS,
+        KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,                               KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_BSPC,
+        KC_LCTL, KC_A,    KC_S,    KC_D,    KC_F,    KC_G,                               KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT,
+        KC_LSFT, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,                               KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_RSFT,
+                                            KC_LGUI, MO(1), KC_SPC,           KC_ENT,  KC_RCTL,  KC_RALT
+    ),
+    [1] = LAYOUT(
+        KC_GRV,   KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,                              KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,
+        KC_TRNS,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,                            KC_PGUP, KC_PGDN, KC_HOME, KC_END,  KC_DEL,  KC_F12,
+        KC_TRNS,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,                            KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT, KC_LBRC, KC_RBRC,
+        KC_TRNS,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,                            KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+                                            KC_TRNS, KC_TRNS, KC_TRNS,           KC_TRNS,  KC_TRNS,  KC_TRNS
+    )
+};
diff --git a/keyboards/silakka54/keymaps/vial/config.h b/keyboards/silakka54/keymaps/vial/config.h
new file mode 100644
index 0000000000..d1d12eae4d
--- /dev/null
+++ b/keyboards/silakka54/keymaps/vial/config.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#pragma once
+
+#define VIAL_KEYBOARD_UID {0x97, 0xD0, 0xA5, 0x97, 0x57, 0x48, 0xD0, 0x4F}
+
+#define VIAL_UNLOCK_COMBO_ROWS { 0, 0 }
+#define VIAL_UNLOCK_COMBO_COLS { 0, 1 }
diff --git a/keyboards/silakka54/keymaps/vial/keymap.c b/keyboards/silakka54/keymaps/vial/keymap.c
new file mode 100644
index 0000000000..aa5e64efa3
--- /dev/null
+++ b/keyboards/silakka54/keymaps/vial/keymap.c
@@ -0,0 +1,22 @@
+// Copyright 2023 QMK
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+    [0] = LAYOUT(
+        KC_ESC,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,                               KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_MINS,
+        KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,                               KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_BSPC,
+        KC_LCTL, KC_A,    KC_S,    KC_D,    KC_F,    KC_G,                               KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT,
+        KC_LSFT, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,                               KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_RSFT,
+                                            KC_LGUI, MO(1), KC_SPC,           KC_ENT,  KC_RCTL,  KC_RALT
+    ),
+    [1] = LAYOUT(
+        KC_GRV,   KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,                              KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,
+        KC_TRNS,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,                            KC_PGUP, KC_PGDN, KC_HOME, KC_END,  KC_DEL,  KC_F12,
+        KC_TRNS,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,                            KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT, KC_LBRC, KC_RBRC,
+        KC_TRNS,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,                            KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+                                            KC_TRNS, KC_TRNS, KC_TRNS,           KC_TRNS,  KC_TRNS,  KC_TRNS
+    )
+};
diff --git a/keyboards/silakka54/keymaps/vial/rules.mk b/keyboards/silakka54/keymaps/vial/rules.mk
new file mode 100644
index 0000000000..4f7618e9b2
--- /dev/null
+++ b/keyboards/silakka54/keymaps/vial/rules.mk
@@ -0,0 +1,2 @@
+VIA_ENABLE = yes
+VIAL_ENABLE = yes
diff --git a/keyboards/silakka54/keymaps/vial/vial.json b/keyboards/silakka54/keymaps/vial/vial.json
new file mode 100644
index 0000000000..c3f9375999
--- /dev/null
+++ b/keyboards/silakka54/keymaps/vial/vial.json
@@ -0,0 +1,78 @@
+{
+    "matrix": {
+        "rows": 10,
+        "cols": 6
+    },
+    "layouts": {
+        "keymap": [
+            [{ "x": 2 }, "0,2", "0,3", { "x": 5.25 }, "5,3", "5,2"],
+            [
+                { "y": -0.75 },
+                "0,0",
+                "0,1",
+                { "x": 2 },
+                "0,4",
+                { "x": 3.25 },
+                "5,4",
+                { "x": 2 },
+                "5,1",
+                "5,0"
+            ],
+            [{ "y": -0.75, "x": 5 }, "0,5", { "x": 1.25 }, "5,5"],
+            [{ "y": -0.5, "x": 2 }, "1,2", "1,3", { "x": 5.25 }, "6,3", "6,2"],
+            [
+                { "y": -0.75 },
+                "1,0",
+                "1,1",
+                { "x": 2 },
+                "1,4",
+                { "x": 3.25 },
+                "6,4",
+                { "x": 2 },
+                "6,1",
+                "6,0"
+            ],
+            [{ "y": -0.75, "x": 5 }, "1,5", { "x": 1.25 }, "6,5"],
+            [{ "y": -0.5, "x": 2 }, "2,2", "2,3", { "x": 5.25 }, "7,3", "7,2"],
+            [
+                { "y": -0.75 },
+                "2,0",
+                "2,1",
+                { "x": 2 },
+                "2,4",
+                { "x": 3.25 },
+                "7,4",
+                { "x": 2 },
+                "7,1",
+                "7,0"
+            ],
+            [{ "y": -0.75, "x": 5 }, "2,5", { "x": 1.25 }, "7,5"],
+            [{ "y": -0.5, "x": 2 }, "3,2", "3,3", { "x": 5.25 }, "8,3", "8,2"],
+            [
+                { "y": -0.75 },
+                "3,0",
+                "3,1",
+                { "x": 2 },
+                "3,4",
+                { "x": 3.25 },
+                "8,4",
+                { "x": 2 },
+                "8,1",
+                "8,0"
+            ],
+            [{ "y": -0.75, "x": 5 }, "3,5", { "x": 1.25 }, "8,5"],
+            [
+                { "y": 0.25, "x": 2.75 },
+                "4,3",
+                "4,4",
+                { "x": 0.25 },
+                "4,5",
+                { "x": 1.25 },
+                "9,5",
+                { "x": 0.25 },
+                "9,4",
+                "9,3"
+            ]
+        ]
+    }
+}
diff --git a/keyboards/silakka54/readme.md b/keyboards/silakka54/readme.md
new file mode 100644
index 0000000000..d0b66348b8
--- /dev/null
+++ b/keyboards/silakka54/readme.md
@@ -0,0 +1,24 @@
+# Silakka54
+
+![Silakka54](https://i.imgur.com/JrsS0kY.png)
+
+Silakka54 is a RP2040 Zero based 54-key column staggered split keyboard. PCB uses hotswap sockets. Design is inspired from REVIUNG41 and Corne keyboards.
+
+* Keyboard Maintainer: [Squalius-cephalus](https://github.com/Squalius-cephalus)
+* Hardware Supported: Silakka54 PCB
+* Hardware Availability: https://github.com/Squalius-cephalus/silakka54
+
+Make example for this keyboard (after setting up your vial build environment):
+
+    make silakka54:vial
+
+Flashing example for this keyboard:
+
+    make silakka54:vial:flash
+
+## Bootloader
+
+Enter the bootloader in 2 ways:
+
+* **Physical boot button**: Hold BOOT button down and connect MCU to the PC
+* **Keycode in layout**: Press the key mapped to `QK_BOOT` if it is available