US Census County Location description Decimal coordinates 1790 Kent County , Maryland 23 miles east of Baltimore 39 ° 16 ′ 30 '' N 76 ° 11 ′ 12 '' W ﻿ / ﻿ 39.27500 ° N 76.18667 ° W ﻿ / 39.27500 ; - 76.18667 1800 Howard County , Maryland 18 miles west of Baltimore 39 ° 16 ′ 06 '' N 76 ° 56 ′ 30 '' W ﻿ / ﻿ 39.26833 ° N 76.94167 ° W ﻿ / 39.26833 ; - 76.94167 1810 Loudoun County , Virginia 40 miles northwest by west of Washington , D.C. 39 ° 11 ′ 30 '' N 77 ° 37 ′ 12 '' W ﻿ / ﻿ 39.19167 ° N 77.62000 ° W ﻿ / 39.19167 ; - 77.62000 1820 Hardy County , West Virginia 16 miles east of Moorefield 39 ° 05 ′ 42 '' N 78 ° 33 ′ 00 '' W ﻿ / ﻿ 39.09500 ° N 78.55000 ° W ﻿ / 39.09500 ; - 78.55000 1830 Grant County , West Virginia 19 miles west - southwest of Moorefield 38 ° 57 ′ 54 '' N 79 ° 16 ′ 54 '' W ﻿ / ﻿ 38.96500 ° N 79.28167 ° W ﻿ / 38.96500 ; - 79.28167 1840 Upshur County , West Virginia 16 miles south of Clarksburg 39 ° 02 ′ 00 '' N 80 ° 18 ′ 00 '' W ﻿ / ﻿ 39.03333 ° N 80.30000 ° W ﻿ / 39.03333 ; - 80.30000 1850 Wirt County , West Virginia 23 miles southeast of Parkersburg 38 ° 59 ′ 00 '' N 81 ° 19 ′ 00 '' W ﻿ / ﻿ 38.98333 ° N 81.31667 ° W ﻿ / 38.98333 ; - 81.31667 1860 Pike County , Ohio 20 miles south by east of Chillicothe 39 ° 00 ′ 24 '' N 82 ° 48 ′ 48 '' W ﻿ / ﻿ 39.00667 ° N 82.81333 ° W ﻿ / 39.00667 ; - 82.81333 1870 Highland County , Ohio 48 miles east by north of Cincinnati 39 ° 12 ′ 00 '' N 83 ° 35 ′ 42 '' W ﻿ / ﻿ 39.20000 ° N 83.59500 ° W ﻿ / 39.20000 ; - 83.59500 1880 Boone County , Kentucky 8 miles west by south of Cincinnati 39 ° 04 ′ 08 '' N 84 ° 39 ′ 40 '' W ﻿ / ﻿ 39.06889 ° N 84.66111 ° W ﻿ / 39.06889 ; - 84.66111 1890 Decatur County , Indiana 20 miles east of Columbus 39 ° 11 ′ 56 '' N 85 ° 32 ′ 53 '' W ﻿ / ﻿ 39.19889 ° N 85.54806 ° W ﻿ / 39.19889 ; - 85.54806 1900 Bartholomew County , Indiana 6 miles southeast of Columbus 39 ° 09 ′ 36 '' N 85 ° 48 ′ 54 '' W ﻿ / ﻿ 39.16000 ° N 85.81500 ° W ﻿ / 39.16000 ; - 85.81500 1910 Monroe County , Indiana in the city of Bloomington 39 ° 10 ′ 12 '' N 86 ° 32 ′ 20 '' W ﻿ / ﻿ 39.17000 ° N 86.53889 ° W ﻿ / 39.17000 ; - 86.53889 1920 Owen County , Indiana 8 miles south - southeast of Spencer 39 ° 10 ′ 21 '' N 86 ° 43 ′ 15 '' W ﻿ / ﻿ 39.17250 ° N 86.72083 ° W ﻿ / 39.17250 ; - 86.72083 1930 Greene County , Indiana 3 miles northeast of Linton 39 ° 03 ′ 45 '' N 87 ° 08 ′ 06 '' W ﻿ / ﻿ 39.06250 ° N 87.13500 ° W ﻿ / 39.06250 ; - 87.13500 1940 Sullivan County , Indiana 2 miles southeast by east of Carlisle 38 ° 56 ′ 54 '' N 87 ° 22 ′ 35 '' W ﻿ / ﻿ 38.94833 ° N 87.37639 ° W ﻿ / 38.94833 ; - 87.37639 1950 Richland County , Illinois Clay County , Illinois 8 miles north - northwest of Olney 3 miles northeast of Louisville 38 ° 50 ′ 21 '' N 88 ° 09 ′ 33 '' W ﻿ / ﻿ 38.83917 ° N 88.15917 ° W ﻿ / 38.83917 ; - 88.15917 38 ° 48 ′ 15 '' N 88 ° 22 ′ 08 '' W ﻿ / ﻿ 38.80417 ° N 88.36889 ° W ﻿ / 38.80417 ; - 88.36889 1960 Clinton County , Illinois 6.5 miles northwest of Centralia 38 ° 35 ′ 58 '' N 89 ° 12 ′ 35 '' W ﻿ / ﻿ 38.59944 ° N 89.20972 ° W ﻿ / 38.59944 ; - 89.20972 1970 St. Clair County , Illinois 5 miles east - southeast of Mascoutah 38 ° 27 ′ 47 '' N 89 ° 42 ′ 22 '' W ﻿ / ﻿ 38.46306 ° N 89.70611 ° W ﻿ / 38.46306 ; - 89.70611 1980 Jefferson County , Missouri 0.3 mile west of DeSoto 38 ° 08 ′ 13 '' N 90 ° 34 ′ 26 '' W ﻿ / ﻿ 38.13694 ° N 90.57389 ° W ﻿ / 38.13694 ; - 90.57389 Crawford County , Missouri 9.7 miles southeast of Steelville 37 ° 52 ′ 20 '' N 91 ° 12 ′ 55 '' W ﻿ / ﻿ 37.87222 ° N 91.21528 ° W ﻿ / 37.87222 ; - 91.21528 2000 Phelps County , Missouri 2.8 miles east of Edgar Springs 37 ° 41 ′ 49 '' N 91 ° 48 ′ 34 '' W ﻿ / ﻿ 37.696987 ° N 91.809567 ° W ﻿ / 37.696987 ; - 91.809567 Texas County , Missouri 2.7 miles northeast of Plato 37 ° 31 ′ 03 '' N 92 ° 10 ′ 23 '' W ﻿ / ﻿ 37.517534 ° N 92.173096 ° W ﻿ / 37.517534 ; - 92.173096 2017 ( estimated ) Wright County , Missouri 11.3 miles southwest of Plato 37 ° 24 ′ 42 '' N 92 ° 23 ′ 40 '' W ﻿ / ﻿ 37.411764 ° N 92.394544 ° W ﻿ / 37.411764 ; - 92.394544 2020 ( projected ) Wright County , Missouri 8.5 miles north - northeast of Hartville 37 ° 22 ′ 18 '' N 92 ° 28 ′ 43 '' W ﻿ / ﻿ 37.371644 ° N 92.478542 ° W ﻿ / 37.371644 ; - 92.478542

Question: in what state was the united states center of population gravity located during the period 1790
Answer: Maryland