(Click on the column title to sort by that column)
| # | Catholics | Population | Percent Catholic | Diocese | Year | Source |
|---|---|---|---|---|---|---|
| 1 | 6,999,402 | 8,605,239 | 81.34% | México (Archdiocese) | 2004 | ap2005 |
| 2 | 5,146,211 | 6,809,345 | 75.58% | Monterrey (Archdiocese) | 2004 | ap2005 |
| 3 | 6,011,044 | 6,600,000 | 91.08% | Guadalajara (Archdiocese) | 2004 | ap2005 |
| 4 | 5,364,880 | 5,647,243 | 95.00% | Netzahualcóyotl | 2004 | ap2005 |
| 5 | 4,054,856 | 4,382,207 | 92.53% | Puebla de los Angeles, Puebla (Archdiocese) | 2004 | ap2005 |
| 6 | 3,400,000 | 4,300,000 | 79.07% | Ecatepec | 2004 | ap2005 |
| 7 | 3,500,000 | 4,000,000 | 87.50% | Cuautitlán | 2004 | ap2005 |
| 8 | 2,865,000 | 3,970,000 | 72.17% | Acapulco (Archdiocese) | 2004 | ap2005 |
| 9 | 3,416,000 | 3,795,967 | 89.99% | León | 2004 | ap2005 |
| 10 | 2,996,000 | 3,404,400 | 88.00% | Valle de Chalco | 2004 | ap2005 |
| 11 | 2,940,975 | 3,337,280 | 88.12% | Toluca | 2004 | ap2005 |
| 12 | 3,010,792 | 3,304,518 | 91.11% | Texcoco | 2004 | ap2005 |
| 13 | 2,864,699 | 3,264,734 | 87.75% | Tlalnepantla (Archdiocese) | 2004 | ap2005 |
| 14 | 2,755,776 | 2,900,000 | 95.03% | Tijuana | 2004 | ap2005 |
| 15 | 2,125,000 | 2,500,000 | 85.00% | Ciudad Juárez | 2004 | ap2005 |
| 16 | 2,273,722 | 2,392,171 | 95.05% | Culiacán | 2004 | ap2005 |
| 17 | 2,259,784 | 2,378,720 | 95.00% | Morelia (Archdiocese) | 2004 | ap2005 |
| 18 | 1,829,341 | 2,080,019 | 87.95% | Cuernavaca | 2004 | ap2005 |
| 19 | 1,400,000 | 2,005,000 | 69.83% | Tuxpan | 2004 | ap2005 |
| 20 | 1,940,000 | 2,000,000 | 97.00% | Tulancingo | 2001 | ap2004 |
| 21 | 1,800,000 | 2,000,000 | 90.00% | Veracruz | 2004 | ap2005 |
| 22 | 1,618,846 | 1,980,000 | 81.76% | Zamora | 2001 | ap2002 |
| 23 | 1,172,469 | 1,891,829 | 61.98% | Tabasco | 2004 | ap2005 |
| 24 | 1,665,000 | 1,850,000 | 90.00% | Matamoros | 2004 | ap2005 |
| 25 | 1,609,060 | 1,838,605 | 87.52% | Yucatán (Archdiocese) | 2004 | ap2005 |
| 26 | 1,734,488 | 1,825,777 | 95.00% | San Luis Potosí (Archdiocese) | 2004 | ap2005 |
| 27 | 1,380,738 | 1,799,648 | 76.72% | Papantla | 2004 | ap2005 |
| 28 | 1,643,532 | 1,730,034 | 95.00% | Querétaro | 2004 | ap2005 |
| 29 | 995,322 | 1,707,059 | 58.31% | San Cristóbal de Las Casas | 2004 | ap2005 |
| 30 | 1,317,533 | 1,705,001 | 77.27% | Mexicali | 2004 | ap2005 |
| 31 | 1,564,000 | 1,700,000 | 92.00% | Durango (Archdiocese) | 2004 | ap2005 |
| 32 | 942,439 | 1,657,160 | 56.87% | Antequera, Oaxaca (Archdiocese) | 2004 | ap2005 |
| 33 | 1,320,000 | 1,625,000 | 81.23% | Tehuantepec | 2004 | ap2005 |
| 34 | 1,557,000 | 1,580,000 | 98.54% | Aguascalientes | 2004 | ap2005 |
| 35 | 1,365,230 | 1,524,120 | 89.57% | Tapachula | 2004 | ap2005 |
| 36 | 1,253,888 | 1,417,607 | 88.45% | Celaya | 2004 | ap2005 |
| 37 | 1,300,000 | 1,350,000 | 96.30% | Zacatecas | 2004 | ap2005 |
| 38 | 1,010,133 | 1,285,624 | 78.57% | Chihuahua (Archdiocese) | 2004 | ap2005 |
| 39 | 968,000 | 1,210,000 | 80.00% | Tula | 2004 | ap2005 |
| 40 | 950,000 | 1,200,000 | 79.17% | Cancún-Chetumal (Territorial Prelature) | 2004 | ap2005 |
| 41 | 924,000 | 1,197,500 | 77.16% | Tuxtla Gutiérrez | 2004 | ap2005 |
| 42 | 1,111,645 | 1,193,840 | 93.12% | Tampico | 2004 | ap2005 |
| 43 | 1,068,671 | 1,088,773 | 98.15% | Tepic | 2004 | ap2005 |
| 44 | 878,899 | 1,080,699 | 81.33% | Coatzacoalcos | 2004 | ap2005 |
| 45 | 1,030,000 | 1,077,660 | 95.58% | Irapuato | 2004 | ap2005 |
| 46 | 970,318 | 1,067,051 | 90.93% | Hermosillo (Archdiocese) | 2004 | ap2005 |
| 47 | 995,498 | 1,062,664 | 93.68% | Jalapa (Xalapa) (Archdiocese) | 2004 | ap2005 |
| 48 | 990,020 | 1,040,111 | 95.18% | Tlaxcala | 2004 | ap2005 |
| 49 | 862,000 | 999,600 | 86.23% | Ciudad Obregón | 2004 | ap2005 |
| 50 | 978,601 | 997,171 | 98.14% | San Juan de los Lagos | 2004 | ap2005 |
| 51 | 890,000 | 990,000 | 89.90% | Ciudad Valles | 2004 | ap2005 |
| 52 | 791,000 | 976,600 | 81.00% | Nuevo Laredo | 2004 | ap2005 |
| 53 | 922,898 | 968,266 | 95.31% | San Andrés Tuxtla | 2004 | ap2005 |
| 54 | 919,126 | 967,471 | 95.00% | Tehuacán | 2004 | ap2005 |
| 55 | 825,000 | 900,000 | 91.67% | Chilpancingo-Chilapa | 2004 | ap2005 |
| 56 | 863,000 | 890,000 | 96.97% | Ciudad Altamirano | 2004 | ap2005 |
| 57 | 862,816 | 875,435 | 98.56% | Atlacomulco | 2004 | ap2005 |
| 58 | 620,244 | 775,305 | 80.00% | Torreón | 2004 | ap2005 |
| 59 | 711,691 | 765,248 | 93.00% | Mazatlán | 2004 | ap2005 |
| 60 | 683,600 | 759,600 | 89.99% | Ciudad Lázaro Cárdenas | 2004 | ap2005 |
| 61 | 600,062 | 750,078 | 80.00% | Campeche | 2004 | ap2005 |
| 62 | 715,000 | 750,000 | 95.33% | Huajuapan de León | 2004 | ap2005 |
| 63 | 645,092 | 711,079 | 90.72% | Colima | 2004 | ap2005 |
| 64 | 630,000 | 700,000 | 90.00% | Apatzingan | 2004 | ap2005 |
| 65 | 660,000 | 700,000 | 94.29% | Tuxtepec | 2004 | ap2005 |
| 66 | 605,555 | 638,165 | 94.89% | Córdoba | 2004 | ap2005 |
| 67 | 498,648 | 551,010 | 90.50% | Orizaba | 2003 | ap2004 |
| 68 | 440,000 | 550,000 | 80.00% | Piedras Negras | 2004 | ap2005 |
| 69 | 524,987 | 546,576 | 96.05% | Saltillo | 2004 | ap2005 |
| 70 | 515,790 | 541,579 | 95.24% | Parral | 2003 | ap2004 |
| 71 | 512,200 | 535,000 | 95.74% | La Paz en la Baja California Sur | 2004 | ap2005 |
| 72 | 494,205 | 522,135 | 94.65% | Huejutla | 2004 | ap2005 |
| 73 | 423,000 | 470,000 | 90.00% | Puerto Escondido | 2004 | ap2005 |
| 74 | 387,241 | 463,762 | 83.50% | Ciudad Victoria | 2004 | ap2005 |
| 75 | 463,000 | 463,500 | 99.89% | Tlapa | 2004 | ap2005 |
| 76 | 413,200 | 438,500 | 94.23% | Ciudad Guzmán | 2004 | ap2005 |
| 77 | 324,960 | 374,338 | 86.81% | Cuauhtémoc-Madera | 2004 | ap2005 |
| 78 | 314,000 | 370,000 | 84.86% | El Salto (Territorial Prelature) | 2004 | ap2005 |
| 79 | 335,121 | 360,345 | 93.00% | Tacámbaro | 2004 | ap2005 |
| 80 | 269,141 | 317,057 | 84.89% | Linares | 2004 | ap2005 |
| 81 | 298,002 | 305,756 | 97.46% | Autlán | 2004 | ap2005 |
| 82 | 275,600 | 285,300 | 96.60% | Tarahumara | 2004 | ap2005 |
| 83 | 213,812 | 249,692 | 85.63% | Matehuala | 2004 | ap2005 |
| 84 | 128,000 | 149,000 | 85.91% | Mixes (Territorial Prelature) | 2004 | ap2005 |
| 85 | 98,993 | 143,991 | 68.75% | Nuevo Casas Grandes | 2004 | ap2005 |
| 86 | 128,000 | 140,000 | 91.43% | Jesús María (del Nayar) (Territorial Prelature) | 2004 | ap2005 |
| 87 | 123,500 | 134,300 | 91.96% | Huautla (Territorial Prelature) | 2004 | ap2005 |
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