| Flag | Date | Use | Description |
|---|
 | 1989 | de facto State flag and civil ensign during the 1989 revolution | The Communist flag with a hole cut out of the middle to remove the coat of arms, as a symbolic protest against the despised Ceauşescu regime |
 | 1965—1989 | Flag of the Socialist Republic of Romania | The arms had a scroll with the word REPUBLICA (left), SOCIALISTĂ (right) and ROMÂNIA (center) and were surmounted by a red star. |
 | 1952—1965 | Flag of the People's Republic of Romania | The arms had a scroll bearing the letters RPR and were surmounted by a red star. |
 | 1948—1952 | Flag of the People's Republic of Romania | The arms had a scroll bearing the letters RPR (no red star). |
 | Jan-Mar 1948 | Flag of the People's Republic of Romania
(never used) | Provisional coat of arms established in January 1948. This is a reconstituted/theoretical model, as the "tractor" coat of arms was never used. |
 | 1940—1947 (and 1927—1930?) | Army flag of the Kingdom of Romania | Blue-yellow-red vertical tricolor with the country's coat of arms in the middle, surrounded by a laurel wreath. In corners, the monogram of king Michael I of Romania, crowned and surrounded by a laurel wreath. |
 | 1930—1942/3 | Army flag of the Kingdom of Romania | Blue-yellow-red vertical tricolor with the country's coat of arms in the middle, surrounded by a laurel wreath. In corners, the monogram of king Carol II of Romania, crowned and surrounded by a laurel wreath. |
 | 1921—1927 (1930?) | Army flag of the Kingdom of Romania | Blue-yellow-red vertical tricolor with the country's coat of arms in the middle, surrounded by a laurel wreath. In corners, the monogram of king Ferdinand I of Romania, crowned and surrounded by a laurel wreath. |
 | 1921—1947 | Army flag of the Kingdom of Romania, official model. Several other models were used instead (see above). Used as military ensign. Not used as war or state flag. | Blue-yellow-red vertical tricolor with the country's coat of arms in the middle. |
 | 1914—1921 | Army flag of the Kingdom of Romania | Blue-yellow-red vertical tricolor with the country's coat of arms in the middle (slightly modified de facto), surrounded by a laurel wreath. In corners, the monogram of king Ferdinand I of Romania, crowned and surrounded by a laurel wreath. |
 | 1902—1914 | Army flag of the Kingdom of Romania | Blue-yellow-red vertical tricolor with the country's coat of arms in the middle (slightly modified de facto), surrounded by a laurel wreath. In corners, the monogram of king Carol I of Romania, crowned and surrounded by a laurel wreath. |
 | 1897—1902 | Army flag of the Kingdom of Romania | Blue-yellow-red vertical tricolor with the country's coat of arms in the middle (slightly modified de facto). In corners, the monogram of king Carol I of Romania, crowned and surrounded by a laurel wreath. |
 | 1882—1897 | Army flag of the Kingdom of Romania | Blue-yellow-red vertical tricolor with the country's coat of arms in the middle (slightly modified de facto). In corners, the monogram of king Carol I of Romania, crowned and surrounded by a laurel wreath. Ratio: 1:1. |
 | 1877—1878 | Army flag of the Principality of Romania | Blue-yellow-red vertical tricolor with the medium country's coat of arms in the middle, on a purple background, surrounded by a laurel wreath. In corners, the monogram of king Carol I of Romania, crowned and surrounded by a laurel wreath. Used during the Romanian War of Independence. Ratio: 1:1. |
| 1874—1881 | Army flag of the Principality of Romania | Blue-yellow-red vertical tricolor with the country's coat of arms in the middle, surrounded by a laurel wreath. In corners, the monogram of king Carol I of Romania, crowned and surrounded by a laurel wreath. Ratio: 1:1. |
 | 1872—1921 | Army flag of the Principality of Romania/Princely standard, official model. Several other models were used instead (see above). Used as military ensign. Not used as war or state flag. | Blue-yellow-red vertical tricolor with the country's coat of arms in the middle. |
 | 1867—1875 | Flag of Focşani civic guard. | Blue-yellow-red vertical tricolor with the city's coat of arms in the middle, and company number in corners. |
 | 1866—1874 | Army flag of the Principality of Romania | Blue-yellow-red horizontal tricolor with company's number in corners and name in the middle. |
 | 1867—1872/3 | Army flag of the Principality of Romania/Princely standard, official model. Used as military ensign. Not used as war or state flag. | Blue-yellow-red vertical tricolor with the country's coat of arms in the middle. |
 | 1867—1947 | Civil ensign of the Principality/Kingdom of Romania | Blue-yellow-red vertical tricolor with blue near the hoist. |
 | 1863—1866 | Army flag of the United Principalities of Romania and after 1866 Principality of Romania | Blue-yellow-red horizontal tricolor with red above. Flying crowned aquila with the coats of arms of Wallachia and Moldavia over it. The aquila holds the sceptre and the sword. In the corners, the monogram of prince Alexandru Ioan Cuza, surrounded by a laurel wreath. On the red scarf it is written: HONOR ET PATRIA. |
 | 1862—1866 | Flag of the Prince of the United Principalities of Moldavia and Wallachia | Blue-yellow-red horizontal tricolor with red above. Coats of arms of Wallachia and Moldavia crowned and surrounded by Romanian tricolors. |
 | 1862—1866 | Civil ensign of the United Principalities of Romania | Blue-yellow-red horizontal tricolor with red above. |
 | 1859—1862 | Civil ensign of the United Principalities of Moldavia and Wallachia | Blue-yellow-red horizontal tricolor with blue above. |
