# List of Romanian counties by population

List of Romanian counties by population presents the evolution of the resident population, by county, between 1948 and 2021. The table is ordered alphabetically, but can be sorted according to the results of each census. The National Institute of Statistics in Romania considered the following reference dates:
* 25 January 1948
* February 21, 1956
* March 15, 1966
* January 5, 1977
* January 7, 1992
* March 18, 2002
* October 20, 2011
* December 1, 2021
In each cell of the table, the number of the population and the demographic growth rate compared to the previous census are shown. The last column shows the population growth rate in the period 1948-2021.
| Județ | Census population of: | Census population of: | Census population of: | Census population of: | Census population of: | Census population of: | Census population of: | Census population of: | 1948- 2021 |
| Județ | 1948 | 1956 | 1966 | 1977 | 1992 | 2002 | 2011 | 2021 | 1948- 2021 |
| Alba | 361,062 ― | 370,800 2.70% | 382,786 3.23% | 409,634 7.01% | 414,227 1.05% | 382,747 −7.53% | 342,336 −10.55% | 325,941 −4,80% | −9.73% |
| Arad | 476,207 ― | 475,620 −0.12% | 481,248 1.18% | 512,020 6.39% | 487,370 −4.77% | 461,791 −5.30% | 412,235 −6.75% | 410,143 −4.76% | −13.87% |
| Argeș | 448,964 ― | 483,741 7.75% | 529,833 9.53% | 631,918 19.27% | 680,574 7.80% | 652,625 −4.20% | 612,431 −6.16% | 569,932 −6.94% | 26.94% |
| Bacău | 414,996 ― | 507,937 22.40% | 598,321 17.79% | 667,791 11.61% | 736,078 10.44% | 706,623 −4.19% | 616,168 −12.8% | 601,387 −2.40% | 44.91% |
| Bihor | 536,323 ― | 574,488 7.12% | 586,460 2.08% | 633,094 7.95% | 634,093 0.91% | 600,246 −6.04% | 575,398 −4.14% | 551,297 −4.19% | 2.79% |
| Bistrița-Năsăud | 233,650 ― | 255,789 9.48% | 269,954 5.54% | 286,628 6.18% | 327,238 14.02% | 311,657 −4.64% | 301,425 −8.16% | 295,988 3.41% | 26.68% |
| Botoșani | 385,236 ― | 428,050 11.11% | 452,406 5.69% | 451,217 −0.26% | 458,904 2.24% | 452,834 −1.84% | 404,429 −8.88% | 392,821 −4.80% | 1.97% |
| Brașov | 300,836 ― | 373,941 24.30% | 442,692 18.39% | 582,863 31.66% | 642,513 10.36% | 589,028 −8.43% | 549,906 −6.76% | 546,615 −0.47% | 81.70% |
| Brăila | 271,251 ― | 297,276 9.59% | 339,954 14.36% | 377,954 11.18% | 392,069 3.72% | 373,174 −4.81% | 316,652 −13.92% | 281,452 −12.38% | 3.76% |
| Buzău | 430,225 ― | 465,829 8.28% | 480,951 3.25% | 508,424 5.71% | 516,307 1.68% | 496,214 −4.01% | 440,347 −9.10% | 404,979 −10.22% | −5.87% |
| Caraș-Severin | 302,254 ― | 327,787 8.45% | 358,726 9.44% | 385,577 7.49% | 375,794 −2.39% | 333,219 −11.46% | 287,535 −11.30% | 246,588 −16.57% | −18.42% |
| Călărași | 287,722 ― | 318,573 10.72% | 337,261 5.87% | 338,807 0.46% | 338,844 0.00% | 324,617 −4.19% | 287,269 −5.52% | 283,458 −7.58% | −1.48% |
| Cluj | 520,073 ― | 580,344 11.59% | 629,746 8.51% | 715,507 13.62% | 735,077 2.91% | 702,755 −4.56% | 691,106 −1.66% | 679,141 −1.73% | 30.59% |
| Constanța | 311,062 ― | 369,940 18.93% | 465,752 25.90% | 608,817 30.72% | 748,044 22.99% | 715,151 −4.49% | 684,082 −4.34% | 655,997 −4.11% | 110.89% |
| Covasna | 157,166 ― | 172,509 9.76% | 176,858 2.52% | 199,017 12.53% | 232,592 17.20% | 222,449 −4.63% | 211,254 −5.52% | 200,042 −4.82% | 27.28% |
| Dâmbovița | 409,272 ― | 438,985 7.26% | 453,241 3.25% | 527,620 16.41% | 559,874 6.52% | 541,763 −3.61% | 510,287 −4.25% | 479,404 −7.58% | 17.14% |
| Dolj | 615,301 ― | 642,028 4.34% | 691,116 7.65% | 750,328 8.57% | 761,074 1.57% | 734,231 −3.66% | 660,544 −10.04% | 599,442 −9.25% | −2.58% |
| Galați | 341,797 ― | 396,138 15.90% | 474,279 19.73% | 581,561 22.62% | 639,853 10.22% | 619,556 −3.35% | 530,612 −13.46% | 496,892 −7.33% | 45.38% |
| Giurgiu | 313,793 ― | 325,045 3.59% | 320,120 −1.52% | 327,494 2.30% | 313,084 −4.32% | 297,859 −4.94% | 267,147 −5.52% | 262,066 −6.88% | −16.48% |
| Gorj | 280,524 ― | 293,031 4.46% | 298,382 1.83% | 348,521 16.80% | 400,100 15.06% | 387,308 −3.42% | 345,771 −11.80% | 314,684 −7.88% | 12.18% |
| Harghita | 258,495 ― | 273,964 5.98% | 282,392 3.08% | 326,310 15.55% | 347,637 6.75% | 326,222 −6.35% | 304,765 −4.71% | 291,950 −6.09% | 12.94% |
| Hunedoara | 306,955 ― | 381,902 24.42% | 474,602 24.27% | 514,436 8.39% | 547,993 6.51% | 485,712 −11.36% | 410,383 −13.82 | 361,657 −13.60% | 17.82% |
| Ialomița | 244,750 ― | 274,655 12.22% | 291,373 6.09% | 295,965 1.58% | 304,008 3.44% | 296,572 −3.13% | 265,559 −7.56% | 250,816 −8.51% | 2.48% |
| Iași | 431,586 ― | 516,635 19.71% | 619,027 19.82% | 729,243 17.80% | 806,778 11.26% | 816,910 0.69% | 772,348 −5.45% | 760,774 −1.50% | 76.27% |
| Ilfov | 167,533 ― | 196,265 17.15% | 229,773 17.07% | 287,738 25.23% | 286,939 −0.27% | 300,123 4.59% | 353,481 29.53% | 542,686 39.61% | 223.94% |
| Maramureș | 321,287 ― | 367,114 14.26% | 427,645 16.49% | 492,860 15.25% | 538,534 9.58% | 510,110 −5.55% | 472,117 −6.17% | 452,475 −5.47% | 40.83% |
| Mehedinți | 304,788 ― | 304,091 −0.23% | 310,021 1.95% | 322,371 3.98% | 332,091 3.20% | 306,732 −7.80% | 259,212 −13.48% | 234,339 −11.70% | −23.11% |
| Mureș | 461,403 ― | 513,261 11.24% | 561,598 9.42% | 605,345 7.79% | 607,298 0.78% | 580,851 −4.79% | 540,508 −5.17% | 518,193 −5.93% | 12.31% |
| Neamț | 357,348 ― | 419,949 17.52% | 470,206 11.97% | 532,096 13.16% | 577,190 8.71% | 554,516 −4.13% | 507,399 −15.10% | 454,203 −3.52% | 27.10% |
| Olt | 442,442 ― | 458,982 3.74% | 476,513 3.82% | 518,804 8.88% | 520,966 0.86% | 489,274 −6.50% | 421,769 −10.81% | 383,280 −12.17% | −13.37% |
| Prahova | 557,776 ― | 623,817 11.84% | 701,057 12.38% | 817,168 16.56% | 873,229 7.00% | 829,945 −5.08% | 762,886 −8.08% | 695,117 −8.88% | 24.62% |
| Satu Mare | 312,672 ― | 337,351 7.89% | 359,393 6.53% | 393,840 9.58% | 400,158 1.76% | 367,281 −8.36% | 336,117 −6.24% | 330,668 −3.98% | 5.76% |
| Sălaj | 262,580 ― | 271,989 3.58% | 263,103 −3.27% | 264,569 0.56% | 266,308 0.84% | 248,015 −7.04% | 225,631 −9.53% | 212,224 −5.42% | −19.18% |
| Sibiu | 335,116 ― | 372,687 11.21% | 414,756 11.29% | 481,645 16.13% | 452,820 −5.97% | 421,724 −6.88% | 377,273 −5.79% | 388,325 −2.26% | 15.88% |
| Suceava | 439,751 ― | 507,674 15.45% | 572,781 12.82% | 633,899 10.67% | 700,799 10.72% | 688,435 −1.91% | 634,810 −7.79% | 642,551 1.22% | 46.12% |
| Teleorman | 487,394 ― | 510,488 4.74% | 516,222 1.12% | 518,943 0.53% | 482,281 −6.76% | 436,025 −9.88% | 369,897 −12.82% | 323,544 −14.88% | −33.62% |
| Timiș | 588,936 ― | 568,881 −3.41% | 607,596 6.81% | 696,884 14.70% | 700,292 0.45% | 677,926 −3.16% | 683,540 0.83% | 650,533 −4.83% | 10.46% |
| Tulcea | 192,228 ― | 223,719 16.38% | 236,709 5.81% | 254,531 7.53% | 270,197 6.47% | 256,492 −5.35% | 211,622 −16.92% | 193,355 −9.26% | 0.59% |
| Vaslui | 344,917 ― | 401,626 16.44% | 431,555 7.45% | 437,251 1.32% | 457,799 5.52% | 455,049 −1.37% | 393,340 −13.09% | 374,700 −5.26% | 8.63% |
| Vâlcea | 341,590 ― | 362,356 6.08% | 368,779 1.77% | 414,241 12.33% | 436,298 5.83% | 413,247 −5.73% | 374,240 −10.05% | 335,312 −8.03% | 0.08% |
| Vrancea | 290,183 ― | 326,532 12.53% | 351,292 7.58% | 369,740 5.25% | 392,651 6.40% | 387,632 −1.47% | 339,510 −12.21% | 341,861 −1.47% | 15.55% |
| Municipiul București | 1,025,180 ― | 1,177,661 14.87% | 1,366,684 16.05% | 1,807,239 32.24% | 2,067,545 14.40% | 1,926,334 −6.83% | 1,883,425 −2.23% | 1,716,961 −8.84% | 67.48% |
| Romania | 15,872,624 ― | 17,489,450 10.19% | 19,103,163 9.23% | 21,559,910 12.86% | 22,760,449 5.80% | 21,680,974 −4.95% | 19,599,506 −7.19% | 19,053,815 −5.31% | 20.04% |