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Siak Sri Indrapura Sultanate

Former Princely State of Indonesia (Dutch Protectorate)

Last modified: 2026-11-07 by zachary harden
Keywords: princely states | siak |
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  3:5, image by Klaus-Michael Schneider, 3 Nov 2026

See also:

Introduction to Sultanate of Siak Sri Indrapura (Kesultanan Siak Sri Inderapura)

It was established by Raja Kecil, leader of a rebellion against Johore, which he defeated in 1718 and ruled it until 1722. He retreated the same year to eastern Sumatra in order to establish a new state on the banks of the Siak River.The Sultanate existed from 1722 until 1949.
The flag was ablack-yellow-green horizontal tricolour.

Sources: English WIKIPEDIA and English WIKIPEDIA
Klaus-Michael Schneider, 3 Nov 2026

Siak

Standard of Sultan

  2:3, image by Jaume Ollé

Note: Before this flag, a plain yellow flag was used. Rühl (1952) shows this on another page.

Jaume Ollé

Old Standard of Sultan

  2:3, image by Jaume Ollé

Vice King Flag


2:3, image by Jaume Ollé
2:3, image by Klaus-Michael Schneider, 27 Oct 2026 		   

The flag of the Vice King (literally: Underking, Dutch: Onderkoning) was either white (see left image above) or yellow (see right image above). Both were surrounded by green edges. It refers also to the standard of a Maharaja Dewa (literally: God Emperor)
Klaus-Michael Schneider, 27 Oct 2026

War Ensign

  2:3, image by Jaume Ollé

It was a red-white-blue horizontal tricolour surrounded by red border.

Merchant Ensign

  2:3, image by Jaume Ollé

It was a red-white-blue horizontal tricolour surrounded by white-blue border.

17th Century Standard of Sultan

  2:3, image by Jaume Ollé

Yellow with an embedded red-white-blue horizontal tricolour shifted to fly.

17th Century Merchant Ensign

  2:3, image by Jaume Ollé

Blue with an embedded red-white horizontal bicolour shifted to fly.

Flag of a Clan Chief (Datu Kampar)

  2:3, image by Jaume Ollé

Local Flag (Tanjung)

  2:3, image by Jaume Ollé

A Tanjung refers to a cape, a headland, or a bend in a river. During the colonial era the term was also frequently used as an integral part of the names of localities, ports, districts, estates or manors.

Ordinary Merchant Ensign

Indragiri: merchant ensign  4:5, image by Jaume Ollé

Source: Anonymus 1865 Flag Chart
Klaus-Michael Schneider, 28 Oct 2026

Merchant Ensign of Notables

Indragiri: merchant ensign  4:5, image by Jaume Ollé

Source: Anonymus 1865 Flag Chart
Klaus-Michael Schneider, 28 Oct 2026

Unassigned Flags

SIAK-1

  2:3, image by Jaume Ollé

SIAK-2

  2:3, image by Jaume Ollé

SIAK-3

  2:3, image by Jaume Ollé

SIAK-4

  2:3, image by Jaume Ollé

SIAK-5

  2:3, image by Jaume Ollé

SIAK-6

  2:3, image by Jaume Ollé

SIAK-7

  2:3, image by Jaume Ollé

SIAK-8

  2:3, image by Jaume Ollé

SIAK-9

  2:3, image by Jaume Ollé

SIAK-10

  2:3, image by Jaume Ollé

SIAK-11

  2:3, image by Jaume Ollé

SIAK-11

  2:3, image by Jaume Ollé

SIAK-13

  2:3, image by Jaume Ollé

SIAK-14

  2:3, image by Jaume Ollé

Royal Palace Museum

Unknown Flag

Klaus-Michael Schneider and Rob Raeside, 5 Nov 2026, based on a sketch of John McMeekin

Siak Black flag with golden Jawi script & frill, hangs in the Royal Palace Museum, it is not known what this flag stands for. The 1884 Royal Coat of Arms of Siak Sri Indrapura Sultanate (Sumatra).
Klaus-Michael Schneider and Rob Raeside, 5 Nov 2026, based on a sketch of John McMeekin

Siak Coat of Arms

Klaus-Michael Schneider and Rob Raeside, 5 Nov 2026, based on a sketch by John McMeekin

Shield Or charged with a fleur-de-lys above from a crescent recumbent, supported by two crowned serpents (Nagas), each holding a swallow tail pennant and crested by a Malay princely coronet. Under the shield is a scroll with Arab inscription.
Klaus-Michael Schneider, 6 Nov 2026

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