| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| MAR BAR L FARMS | airport | United States | 40.28 | -74.39 | 80 | 0 | |
| MARAN | airport | United States | 30.52 | -85.38 | 225 | 0 | |
| MARANA RGNL | airport | United States | 32.41 | -111.22 | 2031 | 0 | |
| MARATHON VENICE | airport | United States | 29.29 | -89.36 | -3 | 0 | |
| MARAVILLAS GAP RANCH | airport | United States | 29.93 | -103.29 | 3325 | 0 | |
| MARBLE CANYON | airport | United States | 36.81 | -111.65 | 3603 | 0 | |
| MARBLE HILL | airport | United States | 38.59 | -85.45 | 791 | 0 | |
| MARBLETON BIG PINEY CLINIC | airport | United States | 42.56 | -110.11 | 6975 | 0 | |
| MARCELLUS | airport | United States | 43.01 | -76.35 | 850 | 0 | |
| MARCH ARB | airport | United States | 33.88 | -117.26 | 1535 | 0 | |
| MARCHINO FIELD | airport | United States | 38.64 | -87.43 | 540 | 0 | |
| MARCHMONT PLANTATION AIRPARK | airport | United States | 35.94 | -80.38 | 730 | 0 | |
| MARCIDALE | airport | United States | 39.69 | -86.60 | 855 | 0 | |
| MARCO ISLAND | airport | United States | 26.00 | -81.67 | 5 | 0 | |
| MARCOR | airport | United States | 41.90 | -87.64 | 1047 | 0 | |
| MARCUS J LAWRENCE MEDICAL CENTER | airport | United States | 34.73 | -112.03 | 3450 | 0 | |
| MARCY FIELD | airport | United States | 44.22 | -73.79 | 985 | 0 | |
| MARFA MUNI | airport | United States | 30.37 | -104.02 | 4849 | 0 | |
| MARGARITAVILLE | airport | United States | 33.72 | -96.87 | 750 | 0 | |
| MARGERISON | airport | United States | 43.95 | -70.14 | 220 | 0 | |
| MARGOS SKY RANCH | airport | United States | 41.04 | -81.82 | 1045 | 0 | |
| MARIA PARHAM HOSPITAL | airport | United States | 36.33 | -78.45 | 465 | 0 | |
| MARIAN | airport | United States | 40.99 | -75.75 | 1285 | 0 | |
| MARIAN AIRPARK | airport | United States | 34.85 | -100.20 | 2008 | 0 | |
| MARIAN HEALTH CENTER NR 2 | airport | United States | 42.50 | -96.40 | 1170 | 0 | |
| MARIAN HEALTH CENTER NR 3 | airport | United States | 42.51 | -96.40 | 1250 | 0 | |
| MARIAN MEDICAL CENTER | airport | United States | 34.95 | -120.41 | 256 | 0 | |
| MARIANNA LEE CO STEVE EDWARDS FLD | airport | United States | 34.78 | -90.81 | 217 | 0 | |
| MARIANNA MUNI | airport | United States | 30.84 | -85.18 | 110 | 0 | |
| MARIAVILLE AERODROME | airport | United States | 42.82 | -74.15 | 1260 | 0 | |
| MARICOPA COUNTY SHERIFF'S OFFICE | airport | United States | 33.38 | -111.83 | 1257 | 0 | |
| MARICOPA MEDICAL CENTER | airport | United States | 33.46 | -112.02 | 1117 | 0 | |
| MARIETTA MEMORIAL HOSPITAL | airport | United States | 39.43 | -81.46 | 742 | 0 | |
| MARINA MUNI | airport | United States | 36.68 | -121.76 | 134 | 0 | |
| MARINE CITY | airport | United States | 42.72 | -82.60 | 613 | 0 | |
| MARINE CONSULTANTS INC | airport | United States | 29.71 | -95.27 | 50 | 0 | |
| MARINE HELICOPTER SQUADRON 361 | airport | United States | 40.96 | -72.57 | 30 | 0 | |
| MARINE SHALE PROCESSORS INC | airport | United States | 29.66 | -91.13 | 20 | 0 | |
| MARINERS HOSPITAL | airport | United States | 25.00 | -80.52 | 9 | 0 | |
| MARIO'S FLYING PIZZA | airport | United States | 29.75 | -96.29 | 233 | 0 | |
| MARION | airport | United States | 42.03 | -91.53 | 862 | 0 | |
| MARION CENTER SPEEDWAY | airport | United States | 40.81 | -79.04 | 1500 | 0 | |
| MARION CO | airport | United States | 32.28 | -84.50 | 682 | 0 | |
| MARION CO | airport | United States | 34.18 | -79.33 | 92 | 0 | |
| MARION CO BROWN FLD | airport | United States | 35.06 | -85.59 | 641 | 0 | |
| MARION CO RANKIN FITE | airport | United States | 34.12 | -88.00 | 442 | 0 | |
| MARION CO RGNL | airport | United States | 36.29 | -92.59 | 719 | 0 | |
| MARION CRITTENDEN CO | airport | United States | 37.33 | -88.12 | 652 | 0 | |
| MARION GENERAL HOSPITAL | airport | United States | 40.57 | -83.13 | 998 | 0 | |
| MARION MUNI | airport | United States | 38.34 | -96.99 | 1390 | 0 | |
| MARION MUNI | airport | United States | 40.62 | -83.06 | 993 | 0 | |
| MARION MUNI | airport | United States | 40.49 | -85.68 | 859 | 0 | |
| MARIPOSA YOSEMITE | airport | United States | 37.51 | -120.04 | 2254 | 0 | |
| MARITIME INSTITUTE | airport | United States | 39.21 | -76.67 | 170 | 0 | |
| MARJORIE KENNAN RAWLINGS | airport | United States | 29.48 | -82.05 | 78 | 0 | |
| MARK ANTON | airport | United States | 35.49 | -84.93 | 719 | 0 | |
| MARK FRANZ PRIVATE STRIP | airport | United States | 37.17 | -119.61 | 2560 | 0 | |
| MARK HOARD MEM | airport | United States | 38.46 | -101.35 | 3303 | 0 | |
| MARK REED HOSPITAL | airport | United States | 47.06 | -123.26 | 256 | 0 | |
| MARK REYNOLDS/NORTH MOBILE COUNTY | airport | United States | 30.91 | -87.98 | 60 | 0 | |
| MARK TWAIN AIR PARK | airport | United States | 39.44 | -91.12 | 840 | 0 | |
| MARK TWAIN ST JOSEPH'S HOSPITAL | airport | United States | 38.19 | -120.67 | 1033 | 0 | |
| MARK'S PARK & AIRFIELD | airport | United States | 44.31 | -88.77 | 855 | 0 | |
| MARKED TREE MUNI | airport | United States | 35.54 | -90.40 | 219 | 0 | |
| MARKET GARDEN | airport | United States | 39.96 | -77.10 | 600 | 0 | |
| MARKET WORLD | airport | United States | 28.06 | -81.82 | 125 | 0 | |
| MARKLE | airport | United States | 40.77 | -75.16 | 320 | 0 | |
| MARKS | airport | United States | 41.94 | -72.71 | 150 | 0 | |
| MARKS MUNI | airport | United States | 36.60 | -78.56 | 421 | 0 | |
| MARKSVILLE MUNI | airport | United States | 31.09 | -92.07 | 79 | 0 | |
| MARKT AIR STRIP | airport | United States | 39.97 | -95.07 | 1140 | 0 | |
| MARLBORO | airport | United States | 42.34 | -71.51 | 285 | 0 | |
| MARLBORO CO JETPORT H E AVENT | airport | United States | 34.62 | -79.73 | 147 | 0 | |
| MARLBORO CORPORATE PARK | airport | United States | 39.86 | -75.70 | 385 | 0 | |
| MARLBOROUGH HOSPITAL | airport | United States | 42.36 | -71.56 | 520 | 0 | |
| MARLETTE | airport | United States | 43.31 | -83.09 | 895 | 0 | |
| MARLIN | airport | United States | 31.34 | -96.85 | 411 | 0 | |
| MARLIN'S MEADOW | airport | United States | 32.95 | -95.58 | 490 | 0 | |
| MARMACK | airport | United States | 30.34 | -95.66 | 295 | 0 | |
| MARR FIELD | airport | United States | 44.85 | -123.26 | 275 | 0 | |
| MARSH BROTHERS AIRSTRIP | airport | United States | 48.62 | -100.98 | 1481 | 0 | |
| MARSH CREEK | airport | United States | 39.82 | -77.29 | 530 | 0 | |
| MARSH POINT | airport | United States | 32.46 | -80.60 | 12 | 0 | |
| MARSHALL AAF | airport | United States | 39.06 | -96.76 | 1063 | 0 | |
| MARSHALL CO | airport | United States | 39.88 | -80.74 | 1214 | 0 | |
| MARSHALL CO | airport | United States | 41.02 | -89.39 | 568 | 0 | |
| MARSHALL COUNTY | airport | United States | 39.88 | -80.74 | 1214 | 0 | |
| MARSHALL COUNTY HOSPITAL | airport | United States | 36.86 | -88.35 | 395 | 0 | |
| MARSHALL DON HUNTER SR | airport | United States | 61.86 | -162.03 | 103 | 0 | |
| MARSHALL FIELD | airport | United States | 39.64 | -85.98 | 800 | 0 | |
| MARSHALL FIELD | airport | United States | 37.42 | -93.21 | 1166 | 0 | |
| MARSHALL MEM MUNI | airport | United States | 39.10 | -93.20 | 779 | 0 | |
| MARSHALL'S | airport | United States | 42.36 | -71.82 | 630 | 0 | |
| MARSHALLTOWN MUNI | airport | United States | 42.11 | -92.92 | 974 | 0 | |
| MARSHDALE | airport | United States | 39.58 | -105.30 | 7700 | 0 | |
| MARSHFIELD MUNI | airport | United States | 44.64 | -90.19 | 1277 | 0 | |
| MARSHFIELD MUNI GEORGE HARLOW FLD | airport | United States | 42.10 | -70.67 | 11 | 0 | |
| MARSTON MILLS | airport | United States | 41.64 | -70.41 | 10 | 0 | |
| MARSTON MILLS | airport | United States | 41.67 | -70.42 | 44 | 0 | |
| MARTENS | airport | United States | 39.21 | -94.27 | 720 | 0 | |
| MARTENS STADIUM | airport | United States | 40.77 | -74.21 | 145 | 0 | |
| MARTHAS VINEYARD | airport | United States | 41.39 | -70.61 | 67 | 0 | |
| MARTHER FIELD | airport | United States | 41.87 | -80.46 | 950 | 0 | |
| MARTIN | airport | United States | 39.50 | -105.11 | 5718 | 0 | |
| MARTIN | airport | United States | 40.18 | -89.50 | 558 | 0 | |
| MARTIN | airport | United States | 46.52 | -124.03 | 10 | 0 | |
| MARTIN | airport | United States | 61.64 | -149.03 | 820 | 0 | |
| MARTIN CAMPBELL FIELD | airport | United States | 35.02 | -84.35 | 1793 | 0 | |
| MARTIN COUNTY | airport | United States | 35.86 | -77.18 | 76 | 0 | |
| MARTIN FIERRO | airport | United States | 42.80 | -90.57 | 1000 | 0 | |
| MARTIN FLD | airport | United States | 46.05 | -118.42 | 746 | 0 | |
| MARTIN FLD | airport | United States | 42.45 | -96.47 | 1100 | 0 | |
| MARTIN MEMORIAL HOSPITAL | airport | United States | 27.20 | -80.24 | 5 | 0 | |
| MARTIN MUNI | airport | United States | 43.17 | -101.71 | 3293 | 0 | |
| MARTIN RLA | airport | United States | 40.11 | -88.83 | 725 | 0 | |
| MARTIN STATE | airport | United States | 39.33 | -76.41 | 22 | 0 | |
| MARTINDALE AHP | airport | United States | 29.43 | -98.38 | 674 | 0 | |
| MARTINDALE EXECUTIVE ARPK | airport | United States | 36.54 | -78.15 | 300 | 0 | |
| MARTINS | airport | United States | 39.50 | -94.18 | 995 | 0 | |
| MARTINS AERODROME | airport | United States | 44.43 | -87.94 | 808 | 0 | |
| MARTINSVILLE/HENRY COUNTY MEMORIAL HOSP. | airport | United States | 36.70 | -79.87 | 1010 | 0 | |
| MARTY 1 | airport | United States | 36.94 | -82.48 | 2000 | 0 | |
| MARTY RANCH | airport | United States | 29.68 | -96.97 | 365 | 0 | |
| MARTY'S TRANQUILITY BASE | airport | United States | 44.70 | -93.47 | 911 | 0 | |
| MARV SKIE LINCOLN COUNTY | airport | United States | 43.46 | -96.80 | 1515 | 0 | |
| MARVIN THIEL FIELD | airport | United States | 41.52 | -84.72 | 859 | 0 | |
| MARY BRIDGE | airport | United States | 47.26 | -122.45 | 409 | 0 | |
| MARY IMMACULATE HOSPITAL | airport | United States | 40.71 | -73.80 | 15 | 0 | |
| MARY IMMACULATE HOSPITAL | airport | United States | 37.14 | -76.51 | 79 | 0 | |
| MARY LANNING MEMORIAL HOSPITAL | airport | United States | 40.59 | -98.39 | 1925 | 0 | |
| MARY NORTH | airport | United States | 37.66 | 61.83 | 728 | 0 | |
| MARY RUTAN | airport | United States | 40.38 | -83.75 | 1345 | 0 | |
| MARY'S LANDING | airport | United States | 42.41 | -88.73 | 910 | 0 | |
| MARY'S PLACE | airport | United States | 38.35 | -96.15 | 1138 | 0 | |
| MARYLAND | airport | United States | 38.60 | -77.07 | 170 | 0 | |
| MARYMOUNT HOSPITAL | airport | United States | 41.42 | -81.60 | 890 | 0 | |
| MARYS RIVER RANCH | airport | United States | 41.32 | -115.25 | 5600 | 0 | |
| MARYSVILLE MEDIPORT | airport | United States | 39.85 | -96.64 | 1283 | 0 | |
| MARYSVILLE MUNI | airport | United States | 39.86 | -96.63 | 1283 | 0 |